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 III wife, Tracy. In August, John Goodman began talks to join the cast in a small role, then described as an antagonist in the same vein as Paul Giamatti's character in "Part II". In September 2012, Justin Bartha said he had signed on to return in the sequel. Principal photography began on Monday, September 10, 2012 in Los Angeles. The following week, Melissa McCarthy entered negotiations to join the cast in a small role and Lela Loren was cast as a police officer. On October 8, 2012, production moved to Nogales, Arizona, which doubled as Tijuana in the film. On October