Over the last couple of years, he's been front and center as the "popular" comedic actor, thanks in part to The Hangover making him more known, more mainstream so to speak. And in honor of the upcoming sequel to the Hangover, let's throw out a rate him thread.
Don't forget he's also had turns in Up In the Air, G-Force, Due Date, Dinner for Schmucks, and is set to voice Humpty Dumpty in the Puss 'n Boots spin off movie. Okay, we'll ignore the last bit.
Before The Hangover, he had a strong cult following while he did stand up comedy.