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Watch Bill Hader Do His Judd Apatow Impression For Judd Apatow

Whether he's imitating his former "SNL" castmates or literally any celebrity ever, Bill Hader is a master impressionist. So when Hader stopped by HuffPost Live along with Judd Apatow and Vanessa Bayer to chat about their new film "Trainwreck," which hits theaters July 17, we had to find out whether Hader does a Judd Apatow impersonation. He does, and it's incredible. And it passed the ultimate litmus test: getting a great laugh out of both Apatow and Bayer.

Watch the hilarious impression in the video above, and click here to watch the full HuffPost Live conversation with the team behind "Trainwreck."

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