See The Cast of ‘The Big Bang Theory’ Before They Were Famous

The Big Bang Theory has been dominating our TV screens since 2007, but have you ever wondered what the cast did before they were playing doctors, scientists, and hopeful waitresses? We all know that Kaley Cuoco-Sweeting and Johnny Galecki were on popular shows before TBBT, but what about the rest of the cast? Not everyone was previously famous before they started working on this hit CBS show!

1
Jim Parsons - Sheldon Cooper
Jim Parsons, Garden State, The Big Bang Theory
Fox Searchlight/CBS
Unlike some of his co-stars, Jim Parsons didn't get up to too much work before he was on TBBT. His first acting credit was on the TV series Ed back in 2002. But better than that, who remembers his small role in Zach Braff's movie Garden State in 2004?
2
Johnny Galecki - Leonard Hofstadter
Johnny Galecki, American Dreamer, The Big Bang Theory
NBC/CBS
Before TBBT, Johnny Galecki gained fame from playing Darlene's boyfriend David on Roseanne in the early '90s. Before that, he was on the TV show Billy as David MacGregor and even before that, he was Danny Nash on American Dreamer, a short lived situation-comedy that aired on NBC in 1991.
3
Kaley Cuoco Sweeting - Penny
Kaley Cuoco Sweeting, My So-Called Life, The Big Bang Theory
ABC/CBS
One of Kaley's first acting credits was on the popular '90s shows My So-Called Life, starring Claire Danes and Jared Leto. She played a young Angela in the episode "Father Figures". After that she had a small guest role on Ellen in 1996. As we all know, she garnered extreme success playing the older daughter (even though she was the younger actress) on 8 Simple Rules with John Ritter and Katey Sagal.
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4
Simon Helberg - Howard Wolowitz
Simon Helberg, A Cinderella Story, The Big Bang Theory
Warner Bros/CBS
The best "before they were famous" moment is easily Simon Helberg's. You might remember Hilary Duff? Queen of the early '00s. She did a movie with Chad Michael Murray back in 2004, A Cinderella Story. Well, Simon Helberg was not yet famous, and played the creepy guy that really wanted to date Hilary's character. Not totally unlike Wolowitz before he met Bernadette.
5
Kunal Nayyar - Raj Koothrappali 
Kunal Nayyar, NCIS, The Big Bang Theory
CBS/CBS
Unlike his other co-stars, Kunal Nayyar didn't have many acting credits before TBBT started in 2007. He was in the 2004 movie S.C.I.E.N.C.E. as the pizza man. After that, he was in an episode of NCIS as Youssef Zidan.
6
Mayim Bialik - Amy Farrah Fowler
Mayim Bialik, Beaches, The Big Bang Theory
Buena Vista Pictures/CBS
Obviously we know that before she was our favorite neuroscientist, she was Blossom Russo on Blossom. But before she made a name for herself on that hit NBC show, she was in the Bette Midler film Beaches as a young CC. She also appeared on The Facts of Life as Jennifer Cole.
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7
Melissa Rauch - Bernadette Rostenkowski
Melissa Rauch, Kath & Kim, The Big Bang Theory
NBC/CBS
The same year Bernadette first appeared on TBBT, Melissa Rauch was in I Love You, Man. But before that, she didn't have much acting experience. She was briefly on the show Kath & Kim as Tina in 2008.
8
Kevin Sussman - Stuart Bloom
Kevin Sussman, Wet Hot American Summer, The Big Bang Theory
USA Films/CBS
We may know him as a lovably pathetic comic book store owner, but some people might recognize Kevin Sussman from his days as Walter on Ugly Betty. Way before that, he was in the cult classic film Wet Hot American Summer as Steve (a role he reprised for the Netflix reboot).

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