What Did the Cast of Big Bang Theory Use to Look Like?

Jim Parsons 1 of 13

We're so used to seeing the cast of "The Big Bang Theory" in their nerdy roles, but now you'll be able to see what Sheldon, Leonard, Penny, and the rest of the gang looked like as young kids!

Jim Parsons didn't always play the role of Sheldon Cooper, but he's has always had that goofy and slightly creepy appearance. Parsons became interested in acting at age 6, but he didn't gain fame until his 30s!