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 director, appears as Mr. Creepy, who appears briefly in an elevator. Mike Tyson appears as himself; Tyson originally refused to appear in the film, but he changed his mind when he found out that Todd Phillips directed "Old School", which Tyson liked. Tyson later said that working on the film convinced him to change his lifestyle. Professional skateboarder Mike Vallely portrays Neeco, the high-speed tuxedo delivery man. Las Vegas personalities Wayne Newton and Carrot Top appear as themselves in the photo slide show. The plot of "The Hangover" was inspired by a real event that happened to Tripp Vinson, a