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 III third film but no script or start date". About the possibility of "The Hangover Part III", Phillips stated, "If we were to do a third one, if the audience, if the desire was there, I think we have a very clear idea where that would head. It's certainly not in the same template that you've seen these movies. The third would be very much a finale and an ending. The most I could say about it, what's in my head, and I haven't discussed it with these actors, is that it is not following that template but very much a