First the good news: Bradley Cooper says that "The Hangover Part III" is in the works. The bad news: it won't start shooting until next September. During an appearance on England's "Graham Norton Show" to promote the DVD release of the domestically $327 million-grossing sequel, Cooper teased that a third edition of the series is in the works. "I personally want to do it. I hope we're going to start shooting in September," Cooper said. "I know [director] Todd Phillips is working on the script."

Norton joked that the $581 million worldwide take of the sequel -- which Cooper noted is the highest-grossing comedy of all time -- suggests that someone might want to greenlight the next chapter. "$581 million, I imagine someone will make that. Even if it's half as successful, it's worth doing," Norton laughed.

Fishing around for what the subject matter might be, say, perhaps a hangover, Cooper rubbed his chin and speculated that new things might be afoot for "Part III."

"We adhered to the formula in the second one, for those of you who've seen it, and the third one, which would close the whole sort of trilogy, which now it would be a trilogy -- even though we thought we would never make a second one, let alone anybody see the first one -- I think it will take place in Los Angeles and maybe not adhere to the structure. It might be different," he said.

Phillips told reporters back in May that he was definitely down for another go 'round. "Quite honestly we really haven't talked about it as we just finished the movie two weeks ago, this is the first time we've all been together in awhile," Phillips said at a press conference. "If we were to do a third one, if the audience... if the desire was there... I think we have a clear idea where that would head and it's certainly not in the same template you've seen these movies ... Obviously, we always envisioned it as a trilogy, as you can imagine. The third would very much a finale and an ending. The most I could say about it — and I haven't discussed it with these actors — is that it is not following that template but very much a new idea."