The Hangover Part II an exotic location. That's all I know". In January 2010, Phillips dismissed rumors that Zac Efron would join the cast of "The Hangover 2", though Ed Helms stated that Efron would be a welcomed addition, commenting, "I love that guy. He's actually really funny". In March 2010, Phillips denied reports that the film would take place in Mexico or Thailand stating, "I don't know. There's a lot of rumors. There was rumor also that it was going to Mexico or something and neither are true". Also by March, Galifianakis, Helms, Bradley Cooper, and Justin Bartha completed negotiations and signed deals
The Hangover Part II Mr. Chow as an offensive caricature and stated doing the character was "very cathartic" for him and said the character "has the inflections of Vietnamese, with kind of the anger of my own Korean nature" although "it's definitely not about an accent, or a stereotype." As the film comes to a close, many photos are revealed depicting the events of the previous night. Among them is a photo which loosely depicts a famous war photo by photographer Eddie Adams of a public execution during the Vietnam War. Film critic Roger Ebert was amongst those who criticized use of the photo,