On September 24, 2007, a show aired on CBS that stole the hearts of science geeks everywhere. This sitcom which follows the lives of a group of socially awkward nerds, was a completely new concept in the world of television, and it was a sitcom that we all needed. People fell in love with the show, nerdy or not, and found the cast to be strikingly relatable.
People fell in love with the show, nerdy or not, and found the cast to be strikingly relatable.Behind the scenes, however, a bit of drama was unfolding. When the stars were resigning their contracts for season 11 and season 12 (the last two of the show), there were multiple negotiations being discussed.
The show’s star actors Jim Parsons, Johnny Galecki and Kaley Cuoco negotiated with CBS together and became the highest paid actors. Mayim Bialik and Melissa Rauch who joined during season 3 and became regulars a year later, also negotiated together and waited to be paid the same amount as the originals. The five co-stars agreed to a $100,000 pay cut per episode in order for the two actresses to receive the salaries that they deserve.
Now that the Big Bang Theory is coming to an end, it is interesting to see how much the whole cast has changed over the last ten years. This show led the actors to major success and wealth. Let’s look at how the cast has transformed as well as the increase in their salaries!
John Galecki as Leonard Hofstadter – Then
We met Leonard during season 1, when he worked as an experimental physicist and Sheldon Cooper’s roommate and best friend. He loves Sheldon but often gets annoyed by his eccentricity.
Leonard is super smart, like the rest of his friends and has a Ph.D from Princeton which he finished when he was the ripe age of 24. He fell in love with Penny, who has dreams of being an actress, and the two eventually tie the knot in the ninth season.
John Galecki as Leonard Hofstadter – Now
TBBT wasn’t John’s first acting gig, but it did make his name a well known one. He now has several awards in his arsenal, including an Emmy for Outstanding Lead Actor in a Comedy Series.
John has since starred in other movies and television shows, but none have brought him the success like his role in this show. John’s role as Leonard made him a salary of $350,000 per episode until the 8th season following a whopping increase to $900,000 per episode.
Jim Parsons as Sheldon Cooper – Then
Sheldon has been a fan favorite since the start of the show. He is a Caltech theoretical physicist and was once roommates with Leonard, his best friend. He easily annoys those around him, has a very serious demeanor and is anal about his routine
He rocks his geekiness and his arrogance, believing himself to be perfect. He started dating neurobiologist Amy in season 5 and they become engaged in season 10.
Jim Parsons as Sheldon Cooper – Now
Jim is another star of the show who found himself blossoming in his role as the beloved Sheldon. He has taken home a Golden Globe and Emmy for his work.
You may have recognized his voice in the animated movie Home, where he plays an eccentric and freethinking alien named Oh. Jim makes $900,000 per episode (along with John and Kaley), making him one of the highest-paid actors in comedy television.
Sara Gilbert as Leslie Winkle – Then
Leslie works at Caltech with Leonard as a physicist. Leslie is a female carbon copy of Leonard, even dressing similarly in hoodie sweatshirts and black framed glasses. In season 1, Leonard asked her out instead of Penny because he felt like Penny was too good of a catch for him.
Sheldon disapproves of their relationship, causing ongoing tension between the two. Ultimately, Leslie and Howard form a casual, no-strings attached relationship with Howard having emotional feelings towards her.
Sara Gilbert as Leslie Winkle – Now
Sara was and still is best known for her long-time role as Darlene Conner on Roseanne, where she will be reliving her role and also acting as the executive producer for the newest revival season. The 42-year-old actress now has 3 children and is married to Linda Perry.
The Conners, a spinoff of Roseanne, will air fall 2018. Roseanne was suddenly canceled following a controversial tweet by star and executive producer Roseanne Barr.
Mayim Bialik as Amy Fowler – Then
Amy started on the show during the season 3 finale where she meets Sheldon. Raj and Howard found her on a dating site and figured that this neurobiologist would be a great fit for Sheldon.
The two date until becoming engaged (with a short break in between) in season 10. Amy is also in Penny’s posse with Penny and Bernadette.
Mayim Bialik as Amy Fowler – Now
Mayim started acting at age 12, eventually landing her most famed role as Amy in TBBT. She is a neuroscientist in real life, so playing the role wasn’t much of a change.
The 41-year-old is now playing the 11th season of the show and signed on for the 12th, also receiving a raise and now earning $500,000 per episode.
Simon Helberg as Howard Wolowitz – Then
Simon plays the role of Howard who is an aerospace engineer and astronaut who has made impressive scientific gains. Howard’s mother is very overprotective.
At the start of the show, Howard hangs with everyone at Leonard and Sheldon’s apartment. During season 3, he meets Bernadette who worked at the time at The Cheesecake Factory with Penny and was pursuing her Ph.D in microbiology. Howard and Bernadette make it official in season 5 and have a daughter named Hallie.
Simon Helberg as Howard Wolowitz – Now
Simon has been starring on the show in a lead role from the very beginning. Other acting jobs he has done include recently acting as Cosme McMoon in the movie Florence Foster Jenkins alongside Meryl Streep and Hugh Grant.
He also played the voice of Bian Zao in Kung Fu Panda: Legends of Awesomeness from 2011-2016. He makes $750,000 per episode, which is less than what other leads make, however still very admirable.
Laura Spencer as Emily Sweeney – Then
Emily, who works as a dermatologist, met Raj during season 7 on his online dating site. Raj dates Emily and Lucy at the same time. Emily isn’t bothered by it, but Lucy is. Raj likes Emily because of her sadistic sense of humor and fondness of horror films.
Raj and Emily date seriously, with Raj eventually breaking up with her to be with Claire. At one point, Raj dates Emily and Claire at the same time and then breaks up with both girls during season 10.
Laura Spencer as Emily Sweeney – Now
Laura played Emily in TBBT while also played the role of Jessica in Bones. Recently, she played Christine in the short film Vitality.
The 31-year-old actress is taking a break from acting and probably won’t be coming back to the show any time soon.
Kunal Nayyar as Rajesh Koothrappali – Then
Raj, an astrophysicist, has been on the show since season 1 where he played Howard’s bff. He also used to spend all of his time hanging out in Leonard and Sheldon’s apartment, along with Howard.
During the first half of the series, Raj’s social anxiety was a major barrier to forming relationships with women. After the sixth season, he became more confident and began to date various women. In season 9, he even found himself caught in between two different women.
Kunal Nayyar as Rajesh Koothrappali – Now
Kunal is most known for his role as Raj in TBBT, however he has done some other acting aside from the show. He recently starred as Tony in the movie Dr. Cabbie and played the voice of Guy Diamond in the DreamWorks animated film Trolls.
He makes $750,000 per episode, which really isn’t bad for a 36-year-old.
Kevin Sussman as Stuart Bloom – Then
Stuart makes his first appearance during the second season where he works as the owner of The Comic Center of Pasadena.
Stuart connects with Raj in season 6 when Howard leaves for space. Single, lonely and depressed, he often feels left out from the guys and looks for constant reassurance from them. He also deals with some financial trouble.
Kevin Sussman as Stuart Bloom – Now
Kevin didn’t make his debut in TBBT as comic expert Stuart. In 2001, he starred in Spielberg’s A.I. Artificial Intelligence playing the role of Supernerd.
The 46-year- old actor is financially successful, despite his character on the sitcom having financial issues. His income isn’t as high as some of the other costars however he still manages $50,000 per episode.
Carol Ann Susi as Debbie Wolowitz – Then
While we never see Debbie’s face throughout the show, her presence as Howard’s overbearing Jewish mother was truly felt.
She is loud and obnoxious, much like her son, with her signature New Jersey accent. While she isn’t a main star of the show, she has definitely become one of the most loved and funny characters.
Carol Ann Susi as Debbie Wolowitz – Now
Carol Ann Susi sadly passed away, breaking many fans’ hearts. Although they never saw her face, fans nonetheless loved her.
Susi died at age 62 from lung cancer. Following her death, costars mourned for her loss and producers of TBBT honored her through the following message: “Mrs, Wolowitz every time you spoke we laughed. Your in our hearts forever.”
Alessandra Torresani as Claire – Then
Claire works as a screenwriter and bartender. She meets Raj and Howard at the comic book store. She wants Raj to write a script with her for a children’s science fiction movie.
Raj is into her but Claire has no interest in him. Raj breaks up with Emily in order to pursue Claire, which only further repulses her. At one point, Claire does have an interest in Raj, who begins to date both Claire and Emily simultaneously, eventually breaking up with both women.
Alessandra Torresani as Claire – Now
Claire, who is thirty years old, was cast in various small parts before being chosen to play the part of Claire in TBBT. Among her gigs include the series Husbands, Two and a Half Man and American Horror Story.
She recently played the role of Amber in an upcoming movie called Step Sisters. We most likely won’t be seeing more of her in the last two seasons of TBBT.
Aarti Mann as Priya Koothrappali – Then
Priya plays the part of Raj’s younger sister. She is a law student who we meet during the 4th season. She dates Leonard and the two don’t tell Raj, who eventually finds out.
Priya agrees to continue to date Leonard under the condition that he cuts off contact with Penny. When Priya’s parents find out about the relationship, they are extremely disappointed and force her to return home. The couple has a long-distance relationship for some time, ultimately finding it frustrating and breaking their loyalty to one another.
Aarti Mann as Priya Koothrappali – Now
The 39-year-old has been cast in several TV series since TBBT. She played Dr. DaSilva in the rom-com drama I’ll See You in My Dreams as well as María Monroe in Suits and Agent Laura Kenney in Scandal.
Recently, she played the part of Holly Harner in an episode of Grey’s Anatomy and filmed an upcoming drama called Love Sonia, playing the part of Jiah.
Sara Rue as Stephanie Barnett – Then
Stephanie works as a doctor and highly distinguished surgical resident at Fremont Memorial Hospital. She is introduced in season 2, when Howard tries to seduce her and allows her to drive a Mars Rover.
Instead, Stephanie meets and falls for Leonard and the pair end up dating. Stephanie moves all of her belongings into Leonard’s apartment and Leonard soon ends their relationship through a text message.
Sara Rue as Stephanie Barnett – Now
Sara has been cast in multiple TV shows since her role as Stephanie. She played Kim Sallinger in Malibu Country, Brenda in Rules of Engagement and Candace in Mom.
She is also playing the part as Librarian in a upcoming Netflix series, A Series of Unfortunate Events, which will be released on January 13, 2019.
Margo Harshman as Alex Jensen – Then
Alex is pursuing her Ph.D in Caltech Physics and works as Sheldon’s assistant. Sheldon often gives her tasks which are unrelated to their research.
Alex wants Leonard and asks him on a date, but Leonard says no because of his loyalty to Penny.
Margo Harshman as Alex Jensen – Now
Margo’s acting career didn’t start in TBBT, rather back when she was a kid in Even Stevens, playing the role of Tawny Dean who was Shia LaBeouf’s character, Louis Stevens’ best friend.
Margo has played several smaller parts since TBBT; she played Alison Kidman in Bones and Delilah Fielding in NCIS.
Brian Patrick Wade as Kurt – Then
Kurt plays the role as Penny’s former boyfriend. The two lived together after Penny moved from Nebraska to California.
Kurt, unlike the guys, isn’t very bright and he’s a tall, muscular and formidable guy. Kurt and Leonard naturally have some beef and it takes Penny some time to get over Kurt although she finds him to be a jerk.
Brian Patrick Wade as Kurt – Now
Brian has played several roles in TV and movies before his role in TBBT. He acted as Mitch Lyons in The Guardian and Fatneck in Bring It On Again.
He also played small parts in Two and a Half Men, Arrested Development, Teen Wolf and Agents of Shield. At the moment he has taking a break from acting and working as a personal trainer.
Charlotte Newhouse as Joy – Then
Bernadette and Howard introduce Joy and Leonard on a double date. Joy shows up to the restaurant after a spin class, still wearing her sweaty workout clothes.
Joy was very obnoxious and crass, and Leonard told Howard that the date was the worst night of his life. However, when Joy suggests that accompanying her to a wedding would result in a hook up, Leonard suddenly jumps at the opportunity.
Charlotte Newhouse as Joy – Now
TBBT wasn’t Charlotte’s first role. She played Jules Hayes in the series Brainstorm as well as Professor Baker in the show Community.
She is most recognized for her role as Billie in the Series Idiotsitter on Comedy Central. On top of this, she sometimes works as a voice actress, recording for such animated shows as Mike Tyson Mysteries and Adventure Time.
Valerie Azlynn as Alicia – Then
Alicia is Leonard, Penny and Sheldon’s former neighbor who lives in the apartment above them. She first meets Leonard and Sheldon in the lobby where Sheldon bombards her with annoying questions. Annoyed, Alicia nonetheless answers every question and Sheldon accepts her.
Leonard, Howard and Raj swoon over her, doing her many favors. Penny is annoyed that Alicia is taking advantage of the boys and jealous. Penny tells the boys that Alicia is using them. The two get into a quarrel after Penny confronts Alicia about this, resulting in Penny’s black eye and the boys stopping to do things for Alicia.
Valerie Azlynn as Alicia – Now
Valerie has been acting long before her gig on TBBT. She played the role as Damien’s assistant in the comedy Tropic Thunder, along with Ben Stiller.
In 2012 she played Melanie Sutton in the series Sullivan & Son. Today, the now 36-year-old continues to play small roles in TV series and films.
Brooke D’Orsay as Christy Vanderbel – Then
Christy is a former friend of Penny from Nebraska who was engaged to Penny’s cousin while sleeping with Penny’s brother Randall. Penny thinks of her as a family member and lets her stay with her for a short time.
Christy hooks up with Howard in Penny’s room and drives Penny out of her own apartment. Christy is very materialistic, and she goes out with Howard under the condition that he buys her stuff. After confronting Howard’s mother, who threatens to take Howard out of his will if they keep dating, she dumps him.
Brooke D’Orsay as Christy Vanderbel – Now
Brooke has acted in multiple series since her role as Christy in TBBT. She acted as Heather Hanson in the comedy series Happy Hour. She also was in an episode of How I Met Your Mother, playing the role as Margaret. She was the voice of Caitlin in the animated series 6Teen for 86 episodes.
She played two different characters In Two and a Half Men, in 2007 she played Robin and in 2014, she played Kate. Recently, she played the role as Paige Collins in the show Royal Pains. Currently, the 35-year-old is taking a well deserved hiatus from acting.
Riki Lindhome as Ramona Nowitzki – Then
Ramona works at Caltech as a postdoctoral researcher and is a big fan of Sheldon and his work. She meets him in the cafeteria and they arrange to have dinner at his apartment.
His friends feel that she is a bit obsessive but Sheldon just appreciates that he’s getting free dinner. During their date, the rest of the gang sits on the couch as onlookers of this strange turn of events. Eventually, Sheldon solves the problem that he’s working on and Ramona wants to share credit for it. He reacts by kicking her out of the apartment.
Riki Lindhome as Ramonda Nowitzki – Now
Riki’s most well-known roles are in the movies Million Dollar Baby and The Last House on the Left. Recently, she has been playing Beatrice in the history comedy series Another Period since 2013. She also was the voice of the character Poison Ivy in the newest Lego Batman Movie.
The 38-year-old actress also acted in an upcoming thriller movie called Under the Silver Lake, alongside Andrew Garfield and Riley Keough (Elvis’s granddaughter).
Eliza Dushku as Angela Page – Then
Angela is an FBI agent who does a background check on Howard when he needs a security clearance to be on the Defense Department Equipped Surveillance Satellite Team.
When she interviews Raj about Howard, Raj is paranoid and only talks about himself, sharing with her that he is definitely legal in the U.S. Then, Leonard hits on her but learns that she is married to a Navy Seal. When Angela interviews Sheldon, he accidentally tells her that Howard once crashed the Mars rover to try and impress a girl. Needless to say, Howard didn’t pass the security clearance to be on the team.
Eliza Dushku as Angela Page – Now
Eliza definitely didn’t start her career in TBBT. When she made her appearance on the series, she was already a well known name in Hollywood.
She played Missy Pantone in the popular cheerleading movie Bring It On, as well as Faith in the Angel and Buffy the Vampire Slayer Series. She had a lead role in the Fox series Dollhouse as Echo. The 36-year-old has recently played roles in Cinemax’s Banshee and CBS’s Bull.
Courtney Henggeler as Missy Cooper – Then
Missy is Sheldon’s fraternal twin sister, who is completely different than her brother. While she is very charming and amicable, Sheldon is anything but. She is introduced in the first season, with Leonard, Howard and Raj all crushing on her.
The men fall over each other trying to win her attention and Sheldon tells them that he will choose who gets to date her. Missy finds an ally with Penny and while they are hanging out at her apartment, each of the guys tries their luck at asking her out, but none of them are successful.
Courtney Henggeler as Missy Cooper – Now
The Big Bang Theory was one of Courtney’s first acting roles. Since the gig, she has acted in a few other minor roles.
In 2013-2015, she acted as Claudia in the hit CBS sitcom Mom, where she acted alongside Anna Faris and Allison Janney. The 36-year-old has recently played the part of Kate in the drama film Feed.
John Ross Bowie as Barry Kripke – Then
Barry Kripke Ph.D. is a Caltech plasma-physicist-turned-string-theorist and Leonard and Sheldon’s colleague. He is impressively smart and has Rhotacism which is also kind of cute, but he can be obnoxious and know exactly how to tick people off.
Nonetheless, he is quite talented and therefore is liked by Sheldon, Howard, Leonard, and Raj. He first appeared in the show during season 2 and has been in every episode ever since.
John Ross Bowie – Now
John is most well known for his part on TBBT, but he has made himself well known even outside of the series.
He is a regular sketch comedy performer and is very present in the world of comedy, both writing and performing sketches. He has also acted in several films such as He’s Just Not That Into You and What the Bleep Do We Know?
Wil Wheaton as Wil Wheaton – Then
Wil Wheaton plays himself in the TBBT from seasons 1 to 11. A little acting was required, as he had to play a darker version of himself.
For some time, he had some turf with Sheldon, but the two reconciled in season 5 and became good friends.
Wil Wheaton – Now
Richard William ‘Wil’ Wheaton III seems to do it all. He’s an actor, T.V. personality, voice actor, writer, and a blogger. He has acted in Star Trek: The Next Generation, Stand By Me, Toy Soldiers, Legion of Superheroes, and Eureka.
On top of all of this, he is also the co-creator and host of the YouTube show, TableTop which is a web-series about games.
Laurie Metcalf as Mary Cooper – Then
Thankfully to Mary Cooper, Sheldon Cooper, the genius himself, is alive. Mary Cooper is Sheldon’s mother.
Mary Cooper and Sheldon Cooper are very different. Mary is a born-again devout christian who constantly checks up on her son and tries to knock some sense into him (following a phone call from Leonard). Mary has acted on every series of the show.
Laurie Metcalf – Now
Laurie Metcalf has had an extensive career with some impressive roles on big TV shows. She has acted in Roseanne, Desperate Housewives, Getting On and The McCarthy’s.
Laurie Metcalf has had an extensive career with some impressive roles on big TV shows. She has acted in Roseanne, Desperate Housewives, Getting On and The McCarthy’s.
Christine Baranski as Dr. Beverly Hofstadter – Then
With the last name Hofstadter, Dr. Beverly Hofstadter is so clearly the mother of Leonard.
She has appeared in ten episodes of the show- however only shot scenes in TBBT studio seven times. The other times was through video chat. Nice work from home job, huh?
Christine Baranski – Now
Similar to many actors and actresses alike, Christine studied at the respected Juilliard School. She has influenced the acting world with her formal and respectable appearance and voice.
Christine Baranski is a very talented actress and has used her talents both on stage and on screen. She has won two Tony Awards and also appeared in the movie adaptation of Mamma Mia. She is now the lead actress in the hit series The Good Fight.
Ian Scott Rudolph as Captain Sweatpants – Then
While Captain Sweatpants doesn’t have a clearly defined role perse or even a proper name, he is still a major part of The Big Bang Theory.
He is known as Captain Sweatpants, a name which comes from the fact that he’s always seen wearing sweatpants and an iconic superhero t-shirt. He can be seen in the comic book store most of the time and was part of seasons 2 to 7.
Ian Scott Rudolph – Now
If you saw Ian Scott Rudolph on the street, you probably wouldn’t be in much awe. The actor has only played small roles in T.V. series.
Besides TBBT, he also appeared in The Middle. He didn’t even receive credit for his work as Captain Sweatpants until season 7. We still love you, Captain Sweatpants.
Brian George as Dr. V.M Koothrappali – Then
Dr. V.M Koothrappali has played a very diverse role on The Big Bang Theory but through it all, we love him.
He plays the role as Raj’s father, and works as a successful gynecologist in New Delhi, India. We mostly see him on video chat with his wife. He makes his first physical appearance in season 8, in ‘The Clean Room Infiltration.’ Hey doc!
Brian George – Now
Much like his character in TBBT, in real life Brian George’s life is also varied. He was born in Jerusalem and has since lived in Israel, London and currently lives in Toronto, Canada.
He studied theater and performing arts at the University of Toronto before landing his first professional acting gig on Austin Powers: International Man of Mystery. He is recognized for his role as Babu Bhatt on Seinfeld and his role on The Big Bang Theory.
Alice Amter as Mrs. Koothrappali – Then
Meet Dr. Koothrappali’s wife for a few seasons and then ex-wife. The couple filed for divorce in 2015. We never learn Mrs. Koothrappali’s first name and we see her only through video chat, just like her husband.
We know that she used to work as a healthcare employee in New Delhi. She has made an appearance in seasons 1 to 5 and in seasons 8. Her character is definitely a memorable one!
Alice Amter – Now
Funnily enough, Alice Amter has moved around a lot, just like her on-screen husband. The English actress has lived in multiple countries including England, Germany, France, Japan and the United States.
Alice Amter moved in her 30’s to Los Angeles in order to pursue acting. She played the role of Dr. Kapoor in Hot in Cleveland. She is most recognized for her role in The Big Bang Theory.
Casey Sander as Mike Rostenkowski – Then
Meeting parents is never easy, especially when that parent is Mike Rostenkowski. Mike plays Bernadette’s father and Howard’s father-in-law.
Mike is a hardened and retired police officer. Bernadette warns Howard about mentioning Jimmy Carter, homosexuals, organic food, gun control and foreigners. We see him in seasons 5,6,7 and 9.
Casey Sander – Now
While Casey Sandler may not have the recognition that some of the other actors on this list have, he still has a pretty impressive resume.
He has appeared on numerous TV series, including Malcolm in the Middle, Hunter, Buffy the Vampire Slayer, Criminal Minds, Mad Men, Rules of Engagement, Sons of Anarchy, just to name a few. On a side note, Casey Sander went to school with Richard Karn and the two were good friends. We would love to meet him!
Vernee Watson-Johnson as Althea – Then
While you may not remember this character, she actually had some pretty memorable moments in the series. Althea works as a nurse in the hospital throughout the series, managing the sperm bank, the patient’s floor and the emergency room.
Vernee`s character is both sarcastic and serious at the same time. Althea was also one of the only characters with Sheldon and Leonard to be transferred from the unaired pilot to the series. Points for Althea!
Vernee Watson-Johnson – Now
Vernee Watson-Johnson is a very talented actress, voice artist, author and acting coach, it seems like she does it all. She is most recognized for her part on The Big Bang Theory, but has other claims to fame.
Many fans know her as Verna Jean Williams on the popular show, Welcome Back, Kotter and as Will Smith’s mother in The Fresh Prince of Bel-Air. She has also appeared in The X-Files, Dexter, Two and a Half Men and more.
Mark Harelik as Dr. Eric Gablehauser – Then
It probably sucks if your boss dates your mom, and that’s exactly what happened to Sheldon Cooper. Dr. Eric Gablehauser is the boss of the Physics Department at Caltech and Leonard, Raj, and Sheldon report to him.
While he does his work professionally and is respectful towards his patients, Sheldon doesn’t like him. Dr. Eric Gablehauser has appeared in seasons 1 and 2 of The Big Bang Theory.
Mark Harelik – Now
Like many of the actors and actresses on this list, Mark Harelik dibbled and dabbled in multiple areas of the acting world. Not only is he an actor, but he’s also a playwright.
Mark has had a long and successful career, acting in major movies and television series, including Jurassic Park III, in the legendary Seinfeld, in the epic Breaking Bad, Prison Break (intense), Battle of the Sexes (hilarious), just to name some. We look forward to seeing him in his next role on TV or film.
Kate Micucci as Lucy – Then
Lucy is a very socially awkward and anxious woman who Raj meets at a singles-only Valentine’s Day party at the comic store.
. Her and Raj develop a romance in season 6, but Lucy eventually ends the relationship through text message after Raj tries to convince Lucy to meet his friends. She says that he took things too far and she doesn’t want to continue in the relationship.
Kate Micucci as Lucy – Now
Kate Micucci has worked as a voice actress in several animated series and films since she appeared in 8 episodes of TBBT. She was the voice of Irma Langinstein in Nickelodeon’s Teenage Mutant Ninja Turtles and Velma Dinkley in Be Cool, Scooby-Doo. She also was the voice of Webbigail in the Disney cartoon DuckTales and Sara Murphy in another Disney show titled Milo Murphy’s Law.
Last year the 37-year-old was the voice of Clayface in the most recent Lego Batman Movie.
April Bowlby as Rebecca – Then
Rebecca is a stunning blonde and girlfriend of Caltech employee Bert. She became a personal trainer after she failed to make it as an actress.
The gang is pretty surprised that a beautiful bombshell is dating an awkward scientist. Sheldon believes that Rebecca is a golddigger. Bert turns up at the apartment and announces that he broke it off with Rebecca.
April Bowlby as Rebecca – Now
April has had several other gigs besides as Rebecca in TBBT. She also played Kandi, the sweet and dimwitted young wife of Alan in Two and a Half Men. She acted as Stacey Barrett in the series Drop Dead Diva for five years.
April Bowlby has made several appearances in television movies such as A Mother’s Crime and Love’s Last Resort. The now 37-year-old’s upcoming role will be as Ms. Hanson in the comedy thriller Love Me or Else.
Kaley Cuoco as Penny Hofstadter – Then
Penny is Sheldon and Leonard’s beautiful blonde neighbor who is introduced in the first season. She considers herself a professional actress, although her acting resume is very short.
Penny gets most of her money from waitressing at The Cheesecake Factory. She has been Leonard’s love interest since the first episode and the couple dated on and off throughout the seasons until eventually getting married in Vegas in season 9. She took a break from being an actress and started to work at Bernadette’s pharmaceutical company instead.
Kaley Cuoco as Penny Hofstadter – Now
Kaley Cuoco had a major role in a sitcom before TBBT. Before starring as Penny, Kaley played the lead role of Bridget Hennessy in the sitcom 8 Simple Rules co-starring with the late John Ritter.
Kaley, along with her costars Jim and John, is one of TV’s highest-paid comedy actors and is now making $900,000 per episode for her role as Penny. This 31-year-old has become a millionaire from her television work and also just launched her own production company.
Melissa Rauch as Bernadette Wolowitz – Then
Bernadette is a former waitress at The Cheesecake Factory who has finished her Ph.D in microbiology. She was introduced to us in the third season, when Penny introduced her to Howard.
At first the two weren’t able to find anything in common, but then bonded over the fact that they both have overbearing mothers. In season 4, Howard proposes to her and they get married in season 6. In season 10 they give birth to their first child, a daughter named Hallie.
Melissa Rauch as Bernadette Wolowitz – Now
Before her major role in TBBT, Melissa made some other television appearances. She played minor parts in The Office and True Blood.
Melissa also acted in a few movies such as The Bronze in 2015 and Are You Here in 2013. The 37-year-old actress (along with Mayim) got a raise after she signed on for season 11 and 12 and is making a whopping $500,000 per episode.
Steven Yeun as Sebastian – Then
Sebastian used to be Sheldon’s roommate before Leonard. He was seen only in a flashback when Leonard tells Penny the story of meeting Sheldon. When Leonard arrives at the apartment building after getting a job at the university, Sebastian is seen exiting the elevator with all of his remaining belongings as he is moving out of the building.
Leonard, asks where Sheldon Cooper’s apartment is and Sebastian tells him to “Run fast, run far.” Later when Leonard visits the apartment, he sees the words “Die Sheldon Die” written on the wall of the bedroom in red paint.
Steven Yeun as Sebastian – Now
Steven had other minor roles such as in TBBT but has since blossomed into a pretty successful actor. He had a lead role as Glenn in The Walking Dead series and acted in the show for seven seasons until his character was brutally and surprisingly killed.
Since then, he has acted in a few other things including the voice of Steve Palchuk in the Netflix animated series Trollhunters. His latest role is Ben in the upcoming South Korean film titled Burning.