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 (film series) opts for a safe, subdued pre-wedding brunch. However, things do not go as planned, resulting in another bad hangover with no memories of the previous night. Once again someone is lost, this time Stu's future brother-in-law, and Phil, Stu, and Alan search for him in Bangkok. Warner Bros. hired Todd Phillips and Scot Armstrong to write a sequel to "The Hangover" after a trailer brought down the house at ShoWest in April 2009, two months before the film was released. The principal actors were cast in March 2010 to reprise their roles from the first film. Production began in October