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

Slideshow posted in Photos | Thursday, March 14, 2013

3 of 12: 'The Big Bang Theory' executive producers Bill Prady and Steven Molaro attend the Paley Center for Media's PaleyFest honoring the CBS show at the Saban Theatre, courtesy of Samsung Galaxy, on Wednesday, March 13, 2013 in Los Angeles. ( Photo / Kevin Parry for Paley Center for Media)

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