'The Big Bang Theory' Cast: Where Are They Now in 2026?

Since its debut in 2007, The Big Bang Theory has become one of the most beloved sitcoms of its time, entertaining fans with its witty humour, endearingly awkward characters, and popularisation of geek culture. The series’ success catapulted the main cast to international fame, transforming relative newcomers into household names by the end of its 12-season run.

Since the series finale in 2019, the cast has gone on to star in an impressive variety of series and films—with some even collaborating together on their own projects or reprising their roles in The Big Bang Theory spinoffs. From Kaley Cuoco’s starring role in HBO’s The Flight Attendant to Mayim Bialik hosting Jeopardy!, see what The Big Bang Theory cast has been up to since the end of the series, and find out where you can stream all their latest projects.

Kaley Cuoco (Penny)

Kaley Cuoco starred in The Big Bang Theory as the bubbly aspiring actress Penny. Although her character starts out as the next-door fixation for the guys, throughout the seasons, she really comes into her own, eventually building a top-notch career and even falling for Leonard. Through The Big Bang Theory, Cuoco achieved an impressive level of fame that she’s maintained since the series’ end. In 2020 she starred in the HBO series The Flight Attendant, which allowed her to showcase her dramatic chops. She also starred opposite Pete Davidson in the 2022 rom-com Meet Cute and in the Peacock series Based on a True Story as a pregnant estate agent who starts a true crime podcast with her husband. In addition, Cuoco continues to voice Harley Quinn in the hit DC animated series Harley Quinn.

Jim Parsons (Sheldon Cooper)

Jim Parsons played Sheldon Cooper, the genius theoretical physicist with a knack for misreading every social situation, throughout all 12 seasons of The Big Bang Theory. Since the end of the series, Parsons has acted as narrator on The Big Bang Theory prequel series Young Sheldon and briefly reprised his role as Sheldon on screen for the series finale in 2024. In addition, Parsons starred in Ryan Murphy’s 2020 acclaimed Netflix series Hollywood, voiced Carl the Sheep in Andy Serkis’ 2025 animated adaptation of George Orwell’s book Animal Farm, and has starred in several Broadway productions. 

Johnny Galecki (Leonard Hofstadter)

Jonny Galecki played experimental physicist and Sheldon’s flatmate and best friend Leonard Hofstadter on all 12 seasons of The Big Bang Theory. Since the series ended, Galecki briefly reprised his role as David Healy on the 2018 Roseanne reboot series and in some episodes of the spinoff series The Conners. However, since then, Galecki has taken a step back from acting and is currently focusing on family life.

Kunal Nayyar (Raj Koothrappali)

Kunal Nayyar played Leonard and Sheldon’s anxious astrophysicist friend, Raj Koothrappali, through the entire run of The Big Bang Theory. Since the series’ end, Nayyar has been in a variety of television and film projects, such as 2020’s Trolls World Tour and 2023’s Trolls Band Together as the voice of Guy Diamond. In 2020, he appeared in an episode of the Netflix series Criminal: UK and in 2022 he starred opposite Uma Thurman in Apple TV+'s Suspicion. He also played a small part in the 2024 teen rom-com series How to Date Billy Walsh and in Netflix's Adam Sandler-starring drama Spaceman.

Simon Helberg (Howard Wolowitz)

Simon Helberg played the aerospace engineer Howard Wolowitz on all the seasons of The Big Bang Theory. Since the end of the series, Helberg has starred in several projects, including Mayim Bialik’s 2022 directorial debut As They Made Us and in Kyra Sedgwick’s rom-com Space Oddity. On television, Helberg appeared as an FBI agent in Netflix’s Poker Face and as the voice of the creepy Dr. Revanche in the animated comedy series American Dad!.

Melissa Rauch (Bernadette Rostenkowski)

Melissa Rauch joined the cast of The Big Bang Theory as microbiologist Bernadette Rostenkowski (later Rostenkowski-Wolowitz) starting in Season 3. After the series ended, Rauch appeared in the 2019 rom-com Ode to Joy and the Steven Soderbergh dramedy The Laundromat. In 2021, Rauch guest hosted 10 episodes of the beloved American game show Jeopardy! and starred from 2023 to 2025 as Judge Abby Stone in the Night Court revival series.

Mayim Bialik (Amy Farrah Fowler)

Mayim Bialik joined The Big Bang Theory cast in Season 3 as Amy, a neurobiologist who winds up in a rollercoaster relationship with Sheldon. Bialik was already well known before being cast in The Big Bang Theory, particularly from her starring role in the 1990s series Blossom. After the end of Big Bang, Bialik starred in the series Call Me Kat from 2020 to 2023, which she produced alongside her on-screen partner Jim Parsons. Bialik also guest hosted Jeopardy! alongside Ken Jennings from 2021 until 2023. 

Kevin Sussman (Stuart Bloom)

Kevin Sussman’s comic book shop owner Stuart Bloom started as a recurring character in the early seasons of The Big Bang Theory before becoming a regular during the last four seasons. Since the series’ end, Sussman has taken on smaller roles in 2022’s Elizabeth Holmes biographical drama The Dropout, in Mayim Bialik’s series Call Me Kat, and in the Breaking Bad spinoff Better Call Saul. In 2023, he played Walter Pine in the Apple TV+ limited series Lessons in Chemistry opposite Brie Larson and Lewis Pullman. An upcoming Big Bang spinoff series starring Sussman as Bloom is in the works at CBS. Although few details are known about the series, its title was revealed in Spring 2026 as Stuart Bloom Fails to Save the Universe, and it will likely be set in the present day.