Conversation so far:
What was Zach Galifianakis's first mainstream performance?
played Alan Garner in the hit comedy The Hangover.
What other roles did he take after that?
G-Force, Youth in Revolt and the Oscar-nominated film Up in the Air.
What role did he play in Up in the Air?
CANNOTANSWER.

Question: Is there any interesting information?
Self-contained rewrite: Is there any other interesting information about Zach Galifianakis besides his appearance in The Hangover?