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 Helms clarified that Clinton merely visited the set and would be surprised if he appeared in the film. In December 2010, it was reported that Bryan Callen, who played the owner of the wedding chapel in "The Hangover", is working again in "The Hangover Part II", as "a smarmy strip club owner in Bangkok". Also in December, Australian stuntman Scott McLean was seriously injured in a traffic accident while filming a stunt sequence near Bangkok. Warner Bros. issued a statement stating McLean was put into a medically-induced coma but is expected to recover. Bradley Cooper said that "logistically, to get