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 crisis. However, things go awry when an incident from the original film comes back to haunt them. "The Hangover Part III" was announced days before the release of "The Hangover Part II" and Mazin, who co-wrote "Part II", was brought on board. In January 2012, the principal actors re-signed to star. In March 2012, Warner Bros. announced a U.S. Memorial Weekend release. The supporting roles were cast between June and September 2012. Principal photography began in September 2012 in Los Angeles, California before moving to Nogales, Arizona and Las Vegas, Nevada. The film was released on May 23, 2013. Two