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 that actress Heather Graham would not be reprising her role as Jade from the first film. Later in the same month it was reported that Mel Gibson would have a cameo appearance in the film as a Bangkok tattoo artist. Four days later Warner Bros. Pictures, Legendary Pictures and director Todd Phillips confirmed that Gibson would not be appearing in the film. Phillips stated: "I thought Mel would have been great in the movie and I had the full backing of [WB president] Jeff Robinov and his team. But I realize filmmaking is a collaborative effort, and this decision ultimately