See Kaley Cuoco, Johnny Galecki, Jim Parsons, and the rest of the Big Bang Theory cast before they found their inner geeks on CBS
Big Bang Theory: Before They Were Famous
It all started with the Big Bang -- or did it? Fans of CBS' Emmy-winning sitcom The Big Bang Theory have come to know and love Kaley Cuoco, Johnny Galecki, and Jim Parsons as their characters, Penny, Leonard, and Sheldon. But they -- and the rest of their adorably geeky gang -- were hard at work in Hollywood long before the show's meteoric success. Here's a look at the cast of The Big Bang Theory in some of their most noteworthy early roles.