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 III not sure who let the dogs out this time, but they should be made to pay." Richard Roeper of the "Chicago Sun-Times" wrote, "Director Todd Phillips delivers a film so different from the first two, I'm not even sure it's supposed to be a comedy." Christy Lemire of the Associated Press gave the film a positive review, writing, ""The Hangover Part III" runs a different sort of risk by going to darker and more dangerous places than its predecessors, both artistically and emotionally. It dares to alienate the very audience that made "The Hangover" the highest-grossing R-rated comedy of all