Released in 2009 and directed by Todd Phillips, The Hangover is a raunchy, high-energy comedy that reinvigorated the "bachelor party gone wrong" trope. The story follows three groomsmen—Phil, Stu, and the eccentric Alan—who wake up in a trashed Las Vegas penthouse with no memory of the previous night and the groom, Doug, missing. As they frantically retrace their steps to find him before his wedding, they uncover a series of increasingly absurd mishaps involving a stolen police car, a tiger in the bathroom, and Mike Tyson. Anchored by the standout chemistry between Bradley Cooper, Ed Helms, and Zach Galifianakis, the film became a massive commercial success and a pop-culture phenomenon.
