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Two days before his wedding, Doug and his three friends drive to Las Vegas for a blow-out bachelor party they'll never forget. But, in fact, when the three groomsmen wake up the next morning, they can't remember a thing. For some reason, they find a tiger in the bathroom and a six-month-old baby in the closet of their suite at Caesars Palace. The one thing they can't find is Doug. With no clue as to what transpired and little time to spare, the trio must retrace their hazy steps and all their bad decisions in order to figure out where things went wrong and hopefully get Doug back to L.A. in time to walk down the aisle.

Director: Todd Phillips

Writer(s): Jon Lucas, Scott Moore, Todd Phillips, Jeremy Garelick

Cast: Bradley Cooper, Ed Helms, Zach Galifianakis, Heather Graham, Justin Bartha, Jeffrey Tambor

Release Date: June 5, 2009

Official Site: HangoverMovie.com

Distributor: Warner Bros. Pictures

Genre: Comedy

Rating: Rated R for pervasive language, sexual content including nudity, and some drug material.