- Directed By: Todd Phillips
- Starring: Bradley Cooper, Ed Helms, Zach Galifianakis
- Year: 2009
- MPAA Rating: R
- Theatrical Release: 6.5.2009
- DVD Release: 12.15.2009
- Plot Summary: After a wild stag party in Las Vegas, three hazy groomsmen (Bradley Cooper, Ed Helms, Zach Galifianakis) must find their missing friend and get him back to Los Angeles in time for his wedding.