Casey Affleck: Joaquin Phoenix Act Was a Hoax

Celebrity News Sep. 17, 2010 AT 8:49AM
Casey Affleck: Joaquin Phoenix Act Was a Hoax Credit: John Parra/WireImage.com

Shocker! Casey Affleck says Joaquin Phoenix's bizarre behavior last year was all just a hoax.

Affleck, 35, filmed Phoenix's antics -- including a wacky appearance on the Late Show With David Letterman -- for the film I'm Still Here, which was released Sept. 10.

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"It's a terrific performance," Affleck tells The New York Times. "It's the performance of his career."

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Despite staying mum last year when asked if Phoenix's act was a hoax, he tells The Times, "I never intended to trick anybody. The idea of a 'hoax' never entered my mind."

The only thing real in the movie: Home footage of Phoenix, now 35, and his sibs performing on the streets of Los Angeles as kids.

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Phoenix is set to return the Late Show With David Letterman Sept. 22.

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