The Hangover Part II takes no chances and opts for a safe, subdued pre-wedding brunch. Things do not go as planned, resulting in another bad hangover with no memories of the previous night. Development began in April 2009, two months before "The Hangover" was released. The principal actors were cast in March 2010 to reprise their roles from the first film. Production began in October 2010, in Ontario, California, before moving on location in Thailand. The film was released on May 26, 2011 and became the highest-grossing R-rated comedy during its theatrical run. A third and final installment, "The Hangover Part III", was released
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