Clark's best friend in real life is Michael Cera, popular comedic actor.
He first acted in the CBS sitcom Hearts Afire from 1992 to 1995 in the role of Elliot Hartman.
He directed the show Clark and Michael as his thesis film in college.
He performed in the movie Superbad in 2007.
He is a Taurus.
He was nominated for a Young Artist Award as an "Outstanding Actor Under Ten in a Television Series."
Clark: If you're not in NY or LA, every where is kind of boring.
Clark: You go to college and no matter who you are, your politics shift wildly to the left, and you drink a lot and you make some mistakes.
Clark: I never watch anything. I'm never home. I watch Adult Swim at night. I try to watch Greek, unless I'm working.