The Hangover Part II is a 2011 American comedy film produced by Legendary Pictures and distributed by Warner Bros. Pictures. The sequel to the 2009 film The Hangover and the second installment in The Hangover trilogy, the film was directed by Todd Phillips, who co-wrote the script with Craig Mazin and Scot Armstrong, and stars Bradley Cooper, Ed Helms, Zach Galifianakis, Ken Jeong, Jeffrey Tambor, Justin Bartha, and Paul Giamatti.

The Hangover is a 2009 American comedy film directed by Todd Phillips and written by Jon Lucas and Scott Moore. It is the first installment in The Hangover trilogy. The film stars Bradley Cooper, Ed Helms, Zach Galifianakis, Heather Graham, Justin Bartha, Ken Jeong, and Jeffrey Tambor. It tells the story of Phil Wenneck (Cooper), Stu Price (Helms), Alan Garner (Galifianakis), and Doug Billings (Bartha), who travel to Las Vegas for a bachelor party to celebrate Doug's impending marriage. However, Phil, Stu, and Alan wake up with Doug missing and no memory of the previous night's events, and must find the groom before the wedding can take place.