Collider:"When Collider spoke to director Todd Phillips at this year’s Guy Choice Awards in June, he told me shooting would begin on The Hangover 2 on October 15. He was close. The reason I say close is I’ve been told the sequel has actually started filming here in Los Angeles. According to my source, shooting began on September 29th and production will continue here until the end of October. At that point, the cast and crew will move to Thailand, and they’ll continue shooting till they wrap."