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THEN & NOW: The cast of 'The Big Bang Theory'

INSIDER Logo By Madison Vanderberg of INSIDER | Slide 1 of 17:  "The Big Bang Theory" is the  longest-running multi-cam sitcom of all time. With 11 seasons under its belt, the beloved CBS sitcom will take its final bow at the  end of season 12, sometime in 2019. Here's where "The Big Bang Theory" cast was at the beginning of the series and where they are now.

"The Big Bang Theory" is the longest-running multi-cam sitcom of all time. With 11 seasons under its belt, the beloved CBS sitcom will take its final bow at the end of season 12, sometime in 2019.

Here's where "The Big Bang Theory" cast was at the beginning of the series and where they are now.

© Warner Bros.

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