- Release Date: June 5, 2009
- Run Time: 1 hr 39 min
- Rating: R - Pervasive Language, Nudity, Sexual Content and Some Drug Material
- Cast: Bradley Cooper, Ed Helms, Zach Galifianakis
- Director: Todd Phillips
- Genre: Comedy
Synopsis: Two days before his wedding, Doug and three friends drive to Las Vegas for a wild and memorable stag party. In fact, when the three groomsmen wake up the next morning, they can't remember a thing; nor can they find Doug. With little time to spare, the three hazy pals try to re-trace their steps and find Doug so they can get him back to Los Angeles in time to walk down the aisle.