Zach Galifianakis (b. 1969) is an American comedian and actor best known for his role in The Hangover. He is reported to appear in The Muppets.
Galifianakis was present during a viral video of a staring contest between Animal and OK Go drummer Dan Konopka backstage at the Webby Awards. (YouTube) He was also photographed with Floyd Pepper and Animal on the event's red carpet.
Gaining more exposure after the success of The Hangover, Galifianakis has hosted Saturday Night Live, and voiced Humpty Dumpty in the 2011 animated film Puss in Boots.