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.
Is there any interesting information?
In 2017, Galifianakis voiced The Joker in The Lego Batman Movie.

Question: Did he do any TV roles?
Self-contained rewrite: Did Zach Galifianakis do any TV roles?