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 Vegas Convention and Visitors Authority received numerous inquiries from persons interested in recreating some of the film's most wild scenes, such as those involving a tiger. The Las Vegas branch of Madame Tussauds added "Hangover"-themed rooms recreating the hotel room and the wedding chapel and a tie-in rooftop cocktail bar. In 2018 Hasbro issued a parody version of their board game "Clue" where players have to locate a missing friend somewhere in the city after a wild night of carousing. Principal photography of "The Hangover Part II" began in October 2010, with Bradley Cooper, Ed Helms, Justin Bartha, and Zach