'The Big Bang Theory's' Simon Helberg’s Impressive Hollywood Impressions

omg! INSIDER 4:33 mins

The hilarious Simon Helberg stopped by the “omg! Insider” newsroom Thursday and spilled a few details about the upcoming season finale of his Emmy Award winning show “The Big Bang Theory.” But, the fun didn’t stop there. The actor also did some pretty impressive impressions of Hollywood’s most loveable characters. From Billy Baldwin to Michael J. Fox’s Marty McFly, Simon pulled out all the stops.

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