The Hangover (2009)

A blowout Las Vegas bachelor party turns into a race against time when three hung-over groomsmen awaken after a night of drunken debauchery to find that the groom has gone missing, and attempt to get him to the alter in time for his wedding. After a blow-out bachelor party, three groomsmen wake in their Las Vegas hotel room to find the groom is missing and they can't remember a thing about what they did the night before.