Two days before his wedding, bachelor Doug Billings travels to Las Vegas with his best friends Phil Wenneck, a … See more

• Bradley Cooper as Phil, a teacher and the leader of the Wolfpack
• Ed Helms as Stu, a dentist
• Zach Galifianakis as Alan, Doug's socially inept future brother-in-law, who has ADHD and acts childishly and erratically… See more

The plot of The Hangover was inspired by a real event that happened to Tripp Vinson, a producer and friend of executive producer Chris Bender. Vinson had gone missing from his own Las Vegas bachelor party, blacking ou… See more

The Hangover was a financial success. As of December 17, 2009 , it had grossed $467,416,722, of which $277,322,503 was in Canada and the United States. It was the tenth-highest-grossing film of 2009 in the world, … See more

On Rotten Tomatoes, The Hangover has an approval rating of 79% based on 240 reviews with an average rating of 6.8/10. The site's critical consensus reads, "With a clever script and hilarious interplay among the cast, T… See more

By depicting and celebrating Las Vegas as the "ultimate guys' getaway", The Hangover had a major impact on Caesars Palace and Las Vegas. It was reported in 2013 that as of that year, guests were still continuing to quote to Ca… See more