The Big Bang Theory Cast: Before They Were Stars! >>Hollywood

Before a certain CBS sitcom turned them all into household names and Emmy darlings, this ensemble was hard at work trying to make it in Hollywood.

While some had already achieved success in the industry by the time The Big Bang Theory premiered, others were still waiting for their big break.

Johnny Galecki and Kaley Cuoco had been around the acting block a time or two prior to becoming Leonard and Penny. Jim Parsons was lesser known but just as talented.

How tmes have changed. The Key Three recently inked a $90 million deal for The Big Bang Theory's final three seasons. Yeah, this show has done them well.

Now that their careers are in the stratosphere, here's look back at the smaller roles that helped get them there. Check out The Big Bang Theory cast, before they were stars.

The Big Bang Theory Cast: Before They Were Stars

1. Kaley Cuoco

After she was Bridget Hennessy on 8 Simple Rules, Kaley Cuoco did a stint as a witch-in-training on Charmed. Then she bought some boobs and moved in next to Leonard and Sheldon to set up residence as Penny on TBBT.

Heard a lot of good things but never seen the show? Want to see your favorite episodes again? Follow the link to