By Wook Kim
May 31, 2007 at 02:00 PM EDT

Chris Elliott turns 47 today. The comedian, who strikes us as something of an acquired taste, was a fixture on the old NBC Late Night With David Letterman set, where he played such characters as “The Regulator Guy,” “The Fugitive Guy,” “The Guy Under the Seats,” and, of course, “Marlon Brando” (first clip below). Later, he played the lead in both a Fox sitcom (Get a Life) and a movie (Cabin Boy) — the latter of which features a cameo of David Letterman “acting” (second clip below — slightly NSFW). Happy birthday, Chris!