Heather Graham Won't Be Returning For 'The Hangover 2'

With "The Hangover 2" now officially in front of cameras, there is one cast member who won't be returning. Warner Bros. has confirmed that Heather Graham, the very funny "escort" in the first film won't be back.

So wait, we get Justin Bartha but not Heather Graham? For shame. A rep tells E! Online, "Unfortunately Heather won't be in the sequel—they way the story unfolds doesn't allow any room for her character to show up. I don't want to reveal to much of the film, but once you see it you'll understand."

We're not sure what kind of intricate puzzle piece the script is that allows Ken Jeong to come back but not Heather Graham, but whatever. Throwing fans a bone, the rep also says that the film will feature an "unbelievable" cameo with the only clue given being that it will be "a guy." Any guesses?