Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
![Backdrop of The Big Bang Theory](https://image.tmdb.org/t/p/w1000_and_h450_multi_faces/7RySzFeK3LPVMXcPtqfZnl6u4p1.jpg)
![The Big Bang Theory](https://image.tmdb.org/t/p/w600_and_h900_bestv2/ooBGRQBdbGzBxAVfExiO8r7kloA.jpg)
The Big Bang Theory (2007)
Top Billed Cast
View all![Johnny Galecki](https://image.tmdb.org/t/p/w276_and_h350_face/kwMOVJvWDkiXEuKiyNJMaoFnhkj.jpg)
Johnny Galecki
Leonard Hofstadter (279 episodes)
![Jim Parsons](https://image.tmdb.org/t/p/w276_and_h350_face/kRFtw6MeT3AzOdE3TWpkxlQwMbb.jpg)
Jim Parsons
Sheldon Cooper (279 episodes)
![Kaley Cuoco](https://image.tmdb.org/t/p/w276_and_h350_face/c01Ma8Jrr2OJ6uoikPwDK34Y8eK.jpg)
Kaley Cuoco
Penny (279 episodes)
![Simon Helberg](https://image.tmdb.org/t/p/w276_and_h350_face/zGrQSfQEw0vO6otWdSXiBHfwv7S.jpg)
Simon Helberg
Howard Wolowitz (279 episodes)
![Kunal Nayyar](https://image.tmdb.org/t/p/w276_and_h350_face/o58v195EJs4U4whNLqyoIh7Qzef.jpg)
Kunal Nayyar
Rajesh Koothrappali (279 episodes)
![Melissa Rauch](https://image.tmdb.org/t/p/w276_and_h350_face/pYcQdUodRdZLpDM2FA0LhW5KhkF.jpg)
Melissa Rauch
Bernadette Rostenkowski (221 episodes)
![Mayim Bialik](https://image.tmdb.org/t/p/w276_and_h350_face/kPsafWVc5H565iTuwS85LtDvvsf.jpg)
Mayim Bialik
Amy Farrah Fowler (217 episodes)
![Kevin Sussman](https://image.tmdb.org/t/p/w276_and_h350_face/tLqrE9uz6GKoeoDC7LU7cE6oF2Q.jpg)
Kevin Sussman
Stuart Bloom (84 episodes)
![Carol Ann Susi](https://image.tmdb.org/t/p/w276_and_h350_face/9O1sHiZOzNjR4hRcvXugtWxx5hD.jpg)
Carol Ann Susi
Debbie Wolowitz (voice) (40 episodes)
Media
![The Big Bang Theory Intro Full Version](https://i.ytimg.com/vi/x6H7k3XBlk4/hqdefault.jpg)
![Season 1 Episode 1 Clip](https://i.ytimg.com/vi/3g2yTcg1QFI/hqdefault.jpg)
![The Big Bang Theory - Science is dead](https://i.ytimg.com/vi/I5mUUOZT6b4/hqdefault.jpg)
![The Big Bang-Sheldon's "Romantic" Christmas Gift](https://i.ytimg.com/vi/yHTEOntn1i0/hqdefault.jpg)
![Merry Newtonmas!](https://i.ytimg.com/vi/1Zkb8Cn-N28/hqdefault.jpg)
![The Big Bang Theory - Sheldon and Penny Exchange Presents](https://i.ytimg.com/vi/FpGkLzGl1CI/hqdefault.jpg)