Bradley Cooper has a doppelganger, and he's been using the star's looks to get into exclusive parties being held at this year's Sundance Film Festival.

Although Cooper doesn't have any movies showing at Sundance, that hasn't stopped the lookalike from talking his way into an after party for the movie White Girl according to Page Six.

After being caught, the man reportedly refused to show his identification.

"He said, 'You're done for!' and would not give ID ... He pushed a button on an iPhone and had a picture of 'The Hangover' as his screensaver." a source told Page Six.

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Plenty of celebrities are in attendance at Sundance, in Utah, including Kiwis Taika Waititi and David Farrier, who are unveiling new movies at the festival.

- nzherald.co.nz