the original cast of the big bang theory
Johnny Galecki as Leonard Hofstadter
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Section::::Cast and characters.

The Big Bang Theory
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Jim Parsons as Sheldon Cooper
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Section::::Cast and characters.

The Big Bang Theory
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Kaley Cuoco as Penny
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Section::::Cast and characters.

The Big Bang Theory
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Simon Helberg as Howard Wolowitz
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Section::::Cast and characters.

The Big Bang Theory
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Kunal Nayyar as Rajesh Koothrappali
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Section::::Cast and characters.

The Big Bang Theory
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