Skip To Content
Homepage
Sign In
Search BuzzFeed
California residents can opt out of "sales" of personal data.

    The Cast Of "The Big Bang Theory" Then And Now

    This year marks the show's 10th year in production. Time flies!

    Whitney Jefferson
    by Whitney Jefferson

    BuzzFeed Staff

    Jim Parsons in 2007:

    Mark Mainz / Getty Images

    Jim Parsons in 2017:

    Valerie Macon / AFP / Getty Images

    Kaley Cuoco in 2007:

    Michael Buckner / Getty Images

    Kaley Cuoco in 2017:

    Alberto E. Rodriguez / Getty Images

    Johnny Galecki in 2007:

    Charley Gallay / Getty Images

    Johnny Galecki in 2017:

    Jonathan Leibson / Getty Images

    Kunal Nayyar in 2007:

    Frederick M. Brown / Getty Images

    Kunal Nayyar in 2017:

    Alberto E. Rodriguez / Getty Images

    Mayim Bialik in 2009:

    Michael Tran / FilmMagic

    Mayim Bialik in 2017:

    Dimitrios Kambouris / Getty Images

    Simon Helberg in 2007:

    Charley Gallay / Getty Images

    Simon Helberg in 2017:

    Frazer Harrison / Getty Images

    Melissa Rauch in 2010:

    Frazer Harrison / Getty Images

    Melissa Rauch in 2017:

    Alberto E. Rodriguez / Getty Images