While she may have sat out last year's trip to Thailand, " The Hangover " thesp Heather Graham is set to return for Todd Phillips' comedy " The Hangover Part III ," which distributor Warner Bros. will co-finance with Legendary Pictures. In the original blockbuster, Graham played Jade, a Las Vegas stripper who marries Ed Helms' character, Stu. " The Hangover Part II " followed Helms and co-stars Bradley Cooper, Zach Galifianakis and Justin Bartha as they traveled to Thailand for Stu's wedding to Lauren ( Jamie Chung ), leaving Jade to stay behind stateside. While plot details remain under wraps for the latest sequel, it's safe to say a reunion between Stu and Jade is on the itinerary. Graham joins fellow franchise veterans Mike Epps and Ken Jeong in the ensemble cast, which is expected to add several well-known actors in cameo roles. In addition to co-writing the script with Craig Mazin, Phillips will also produce with Daniel ...