Will Arnett has only recently come onto the national scene since his character G.O.B. became one of the funniest on Arrested Development.
This guy knows comedy and he clearly has the chops to take dialog and make it ten times funnier than it has any right to be.
From seeing his other appearances on talk shows and other interviews he clearly has a talent for improv and ad-libbling as well.
His movie career is just starting with roles in Blades of Glory and his staring role in that disappointing prison movie. He recently appeared on an episode of 30 rock and I hope he returns next season, as he was fantastic.