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 trailer was released online in February 2011. The first full trailer was released in April 2011. Later in the same month Warner Bros. pulled the trailer from theaters for violating an MPAA rule stating that films can only trailer before similarly rated movies. The trailer for the R-rated comedy was being promoted at screenings for the PG-13-rated "Source Code" against MPAA regulations. Warner Bros. released a statement saying, "In our haste to meet the placement schedule for this trailer, we failed to properly vet the final version with the MPAA. We acted immediately to correct the mistake and removed the