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The Big Bang Theory Bios
The Big Bang TheoryJohnny Galecki
Johnny Galecki stars as the brilliant Leonard Hofstadter. Before his starring role on The Big Bang Theory, Galecki was best known to television audiences for his role as David in the long-running comedy series Roseanne. The Big Bang TheoryJim Parsons
Jim Parsons stars as the brainy-but-socially-awkward Sheldon Cooper. The role has won him numerous awards, including two Emmy Awards and a Golden Globe Award. The Big Bang TheoryKaley Cuoco
Kaley Cuoco stars as Penny, a free-spirited beauty who turns the boys' world upside-down. Prior to The Big Bang Theory, Cuoco was best known for her role as Bridget Hennesy in 8 Simple Rules. The Big Bang TheorySimon Helberg
Simon Helberg stars as Howard. Prior to his work on The Big Bang Theory, Simon was a regular on the sketch comedy show MADtv. The Big Bang TheoryKunal Nayyar
Kunal Nayyar stars as Rajesh. Kunal's role in The Big Bang Theory is his first as a regular on a television series. The Big Bang TheoryMayim Bialik
Mayim Bialik stars as Amy. Mayim began her successful acting career as a child and is best known for her lead role as Blossom Russo in the early-1990s sitcom, Blossom. The Big Bang TheoryMelissa Rauch
Melissa Raunch stars as Bernadette. Melissa's television career spans such hit shows as True Blood and The Office,
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