The Hangover is a 2009 American comedy film directed by Todd Phillips. The film stars Bradley Cooper, Ed Helms, Zach Galifianakis, Justin Bartha, and Heather Graham.
Two days before his wedding, Doug (Justin Bartha) feels that his days as a bachelor are coming to an end. Doug finally invites his three best friends, Phil (Bradley Cooper), Stu (Ed Helms), and Alan (Zach Galifianakis) to Las Vegas to celebrate his bachelor party.
Arriving in Las Vegas, they stay at Caesars Palace. On the roof of the hotel, they were drunk all night. The next day strange things start happening, they wake up and they can't remember what happened the night before.
The Hangover movie poster
Almost the entire facility of Caesars Palace, Las Vegas was used for filming, including the casino, front desk, lobby, swimming pool, corridors, elevator and the famous rooftop. Caesars Palace is also a regular shooting location for other films: Rain Man (1988), Iron Man (2008), Dreamgirls (2006) and The Big Short (2015).
