The Hangover Part III will begin production in September. The third installment in the comedy movie series - starring Bradley Cooper, Zach Galifianakis and Ed Helms - is planned for a May 2013 release, although a storyline is not yet known.

President of Warner Bros. Pictures Group Jeff Robinov revealed he was delighted to have director Todd Phillips back on board for the project. "We are extremely pleased to have Todd Phillips and the guys back together again for another Hangover and we look forward to collaborating with them on another great movie," he said in a statement.

"I'm so excited to embark on another Hangover film with Bradley, Ed and Zach. We're going to surprise a lot of people with the final chapter we have planned. It will be a fitting conclusion to our three-part opera of mayhem, despair and bad decisions," Todd said.

Craig Mazin and Todd will write the screenplay for the project.