People you will see in The Hangover Part II: Zach Galifianakis, Bradley Cooper and Ed Helms. People who you will not see: Liam Neeson. Monkeys you will see: that monkey they have now.

Neeson's cameo as a tattoo artist in Bangkok was cut from The Hangover Part II. Director Todd Phillips needed to re-shoot the scene for continuity reasons three weeks ago, but Neeson was in London shooting Clash of the Titans 2: Titan Up. At the last minute, Phillips got Nick Cassavetes to sub-in.
"He came in and crushed it and that is the scene that you will ultimately see in the film," said Phillips in a recent interview. "[I'm excited for everyone] to see the film. It turned out great."

The small part has been recast three times. It was going to be played by Mel Gibson, until the cast was like, "he's... kind of a horrible racist?" So then they cast Neeson, but the above hullabaloo led to Cassavetes nabbing the role. A lot of fuss over a small cameo - hopefully they had time to focus on, y'know, the rest of the movie.

The Hangover Part II drunkenly stumbles into theaters May 26, though the film may not remember it did that on the 27th. (Variety)