'Big Bang Theory' cast celebrates four years at PaleyFest (Photos)

Slideshow posted in Photos | Thursday, March 14, 2013

12 of 12: Pauley Perrette attends the Paley Center for Media's PaleyFest honoring the CBS show 'The Big Bang Theory' at the Saban Theatre, courtesy of Samsung Galaxy, on Wednesday, March 13, 2013 in Los Angeles. The actress, who stars in the CBS series 'NCIS,' served as the moderator of the event. ( Photo / Kevin Parry for Paley Center for Media)

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