The Hangover (film series) 2010, in Ontario, California, before moving on location in Thailand. Two years after "The Hangover Part II", Phil, Stu, and Doug are happily living uneventful lives at home. The only member of the Wolfpack who is not content is Alan. Still lacking a sense of purpose, Alan has ditched his meds and given in to his natural impulses until the untimely death of his father forces him to finally re-evaluate his lifestyle and seek the help he needs. Phil, Stu, and Doug are there to make sure Alan takes the first step. This time, Alan gets married to Cassandra, and
The Hangover Part III wife, Tracy. In August, John Goodman began talks to join the cast in a small role, then described as an antagonist in the same vein as Paul Giamatti's character in "Part II". In September 2012, Justin Bartha said he had signed on to return in the sequel. Principal photography began on Monday, September 10, 2012 in Los Angeles. The following week, Melissa McCarthy entered negotiations to join the cast in a small role and Lela Loren was cast as a police officer. On October 8, 2012, production moved to Nogales, Arizona, which doubled as Tijuana in the film. On October