Starring Bradley Cooper, Ed Helms, Zack Galifianakis, Ken Jeong, Paul Giamatti, Justin Bartha, Jeffrey Tambor, Mason Lee, Jamie Chung and Nick Cassavetes. Directed by Todd Phillips.
When I think of the best sequels, they contain elements of the first movie, but they stand up solidly as their own story. Aliens, Godfather II, Empire Strikes Back, The Dark Knight. Some of the worst try to be carbon copies, hitting all the same beats but with tiny tiny differences. This unfortunately falls into that latter camp.
The movie begins the same way the first one did. Phil on the phone letting a bride-to-be know they've really messed up this time. Flashback to one week earlier.
Phil, Stu, Alan and Doug are together again, going to Thailand for Stu's wedding. They take Stu's future brother-in-law Teddy with them for "just one drink" on the beach. Cut to the next morning. Phil, Stu and Alan wake up in a trashed apartment with no idea what happened. But it's Bangkok instead of Vegas. And the surprise animal in the bathroom is a monkey instead of a tiger.
And it keeps going and going just like that, right down to the slide show of their wild night during the closing credits. It is basically the same movie as the first one, but far less funny.