"The Hangover Part II" is director Todd Phillips' follow-up to 2009's smash hit "The Hangover," which became the highest-grossing R-rated comedy of all-time and also won the Golden Globe for Best Film - Comedy or Musical. Reprising their roles from "The Hangover," Bradley Cooper, Ed Helms, Zach Galifianakis, and Justin Bartha star in the film. Jeffrey Tambor, Ken Jeong and Mike Tyson also rejoin the cast. In "The Hangover Part II," Phil (Bradley Cooper), Stu (Ed Helms), Alan (Zach Galifianakis) and Doug (Justin Bartha) travel to exotic Thailand for Stu's wedding. After the unforgettable bachelor party in Las Vegas, Stu is taking no chances and has opted for a safe, subdued pre-wedding brunch. However, things don't always go as planned. What happens in Vegas may stay in Vegas, but what happens in Bangkok can't even be imagined.