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 Part II 2009, Warner Bros. hired Todd Phillips, who directed "The Hangover", to write a sequel with Scot Armstrong. The deal, reached two months before the release of "The Hangover" in June 2009, came as result of "The Hangover"'s positive screen tests, and a trailer which drew a strong reaction from audiences at ShoWest. The writers from the first film, Scott Moore and Jon Lucas, decided not to come back to write the sequel because, according to Lucas, "they were done with that story…and didn't want to just write "Hangover" sequels their whole careers". "Variety" reported in July 2009, that production on