Since its debut in 2007, The Big Bang Theory has been a fan favorite, introducing us to a quirky group of CalTech scientists and their neighbor, Penny. After a decade on air, let’s see how the cast members have transformed from then to now.
Simon Helberg as Howard Wolowitz – Then
Howard Wolowitz, often underestimated by Sheldon for his Master’s degree from MIT, eventually proves his mettle by becoming an astronaut for NASA. In the early seasons, Howard’s unsuccessful attempts at dating took a turn when Penny introduced him to Bernadette, her coworker at the Cheesecake Factory.
Simon Helberg as Howard Wolowitz – Now
From his debut as a nerdy mama’s boy, Simon Helberg has been a series regular since day one. Beyond The Big Bang Theory, Simon has made a mark in films, notably starring as pianist Cosme McMoon in Florence Foster Jenkins, alongside Meryl Streep and Hugh Grant.
Laura Spencer as Emily Sweeney – Then
Introduced in the seventh season, Laura Spencer played Emily Sweeney, a dermatologist with a macabre sense of humor. Her relationship with Raj was marked by shared interests in horror films and dark jokes, although Raj’s commitment issues caused tensions.
Laura Spencer as Emily Sweeney – Now
Laura Spencer juggled her role in The Big Bang Theory with her part as Jessica Warren in Bones. While her return to The Big Bang Theory remains uncertain, she recently starred in the short film Vitality as Christine.
Kunal Nayyar as Rajesh Koothrappali – Then
Raj Koothrappali, an astrophysicist from New Delhi, struggled with severe social anxiety in the early seasons, unable to speak in the presence of women unless intoxicated. Over time, Raj overcame these issues, allowing for more complex storylines.
Kunal Nayyar as Rajesh Koothrappali – Now
Kunal Nayyar’s portrayal of Raj has evolved significantly, making him one of the highest-paid actors on the show, earning $750,000 per episode. His film credits include Dr. Cabbie and voice work in Trolls.
Kevin Sussman as Stuart Bloom – Then
Stuart Bloom, the comic book store owner, often appeared in the group’s adventures despite not being a core member. His character, known for his downcast demeanor, struggled more than the main group to fit in.
Kevin Sussman as Stuart Bloom – Now
Before joining The Big Bang Theory, Kevin Sussman appeared in Ugly Betty and A.I. Artificial Intelligence. He also reprised his role as Steve in Wet Hot American Summer: First Day of Camp on Netflix.
Sara Gilbert as Leslie Winkle – Then
Sara Gilbert played Leslie Winkle, the female counterpart to Leonard. Their brief relationship was challenged by Leslie’s frequent clashes with Sheldon.
Sara Gilbert as Leslie Winkle – Now
After her time on The Big Bang Theory, Sara returned to her iconic role as Darlene Connor in the Roseanne revival and continues as a co-host on The Talk. She also serves as an executive producer on the Roseanne revival.
Melissa Rauch as Bernadette Wolowitz – Then
Introduced in season three, Bernadette, a microbiologist, initially struggled to connect with Howard. They eventually married, making Howard the first in the group to settle down.
Melissa Rauch as Bernadette Wolowitz – Now
Melissa Rauch’s role on The Big Bang Theory was her breakthrough. Outside the show, she has appeared in True Blood and The Bronze and voiced Francine in Ice Age: Collision Course.
Jim Parsons as Sheldon Cooper – Then
Jim Parsons’ portrayal of Sheldon Cooper, a theoretical physicist with social awkwardness, became a defining role. Sheldon’s interactions often highlighted his genius and lack of social cues.
Jim Parsons as Sheldon Cooper – Now
Jim Parsons’ performance earned him numerous awards, including four Primetime Emmy Awards. His Broadway debut in A Normal Heart and a $900,000 per episode salary reflect his success.
Sara Rue as Stephanie Barnett – Then
Stephanie Barnett, a surgical resident, briefly dated Leonard after rejecting Howard’s advances. Their relationship ended when Leonard realized she had essentially moved in with him.
Sara Rue as Stephanie Barnett – Now
Post-The Big Bang Theory, Sara Rue appeared in Rules of Engagement and Mom. She recently acted in A Series of Unfortunate Events on Netflix.
Margo Harshman as Alex Jensen – Then
Alex Jensen, a doctoral student and Sheldon’s assistant, developed a crush on Leonard, much to Penny’s dismay. Leonard, however, stayed loyal to Penny.
Margo Harshman as Alex Jensen – Now
Margo Harshman, known for her role on Even Stevens, has been portraying Delilah Fielding on NCIS since 2013. She also starred in Love on the Vines.
John Ross Bowie as Barry Kripke – Then
Barry Kripke, Sheldon’s rival, is known for his sarcasm and speech impediment. His character added humor with his witty remarks and frequent clashes with Sheldon.
John Ross Bowie – Now
John Ross Bowie’s extensive comedy background includes writing and performing. He now stars as Jimmy DiMeo on Speechless.
Wil Wheaton as Wil Wheaton – Then
Playing an exaggerated version of himself, Wil Wheaton joined the show as a celebrity Sheldon admired but later antagonized. Over time, their on-screen rivalry mellowed.
Wil Wheaton – Now
Wil Wheaton, famous from Star Trek, continues acting and hosts the YouTube series TableTop. His voice acting and on-screen appearances keep him active in the industry.
Laurie Metcalf as Mary Cooper – Then
Mary Cooper, Sheldon’s religious mother, often clashed with his scientific views but always supported him. Laurie Metcalf brought warmth and humor to the role.
Laurie Metcalf – Now
Laurie Metcalf, a seasoned actress, returned to Roseanne and has won a Tony Award. She also voiced Andy’s mom in the Toy Story series.
Christine Baranski as Dr. Beverly Hofstadter – Then
Christine Baranski portrayed Leonard’s cold, analytical mother, Dr. Beverly Hofstadter. Her relationship with Leonard was strained due to her clinical parenting style.
Christine Baranski – Now
A Juilliard graduate, Christine Baranski’s range extends from The Good Wife to musical films like Chicago. She is set to appear in The Good Wife’s spin-off.
Johnny Galecki as Leonard Hofstadter – Then
Leonard Hofstadter, a physicist smitten with Penny, has been part of the core cast since the beginning. His relationship with Penny evolved over the series.
Johnny Galecki as Leonard Hofstadter – Now
Famous from Roseanne, Johnny Galecki’s role on The Big Bang Theory earned him multiple award nominations. He took a pay cut to ensure equal pay for co-stars Mayim Bialik and Melissa Rauch.
Brian George as Dr. V.M Koothrappali – Then
Raj’s father, Dr. V.M. Koothrappali, a gynecologist from New Delhi, often appeared via video calls, humorously interacting with Raj.
Brian George – Now
Brian George, born in Jerusalem and raised in London, is best known for his role on Seinfeld. He currently stars as Arjun Avasarala in The Expanse.
Kate Micucci as Lucy – Then
Lucy and Raj first met at a Valentine’s Day party, but their relationship was rocky due to her social anxiety. Their romance ended after several attempts to make it work.
Kate Micucci as Lucy – Now
Before The Big Bang Theory, Kate Micucci appeared in Scrubs, ‘Til Death, and Motorcity. She is also known for her voice work, including Clayface in The Lego Batman Movie. As part of the comedy duo Garfunkel and Oates, she continues to charm audiences. Recently, she voiced Sara Murphy in Milo Murphy’s Law.
