Christopher Mintz-Plasse as McLovin in Superbad
Apart from Emma Stone, Jonah Hill, and Michael Cera, McLovin was the most beloved character in the coming-of-age movie Superbad. It was because of his sassy courage mixed with his uber-geeky persona, not to mention that he was a 25-year old Hawaiian organ donor who was friends with police officers, Seth Rogen and Bill Hader.
Nell, Er ... eyebrows?