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Sean M. Whalen (born May 19, 1964) is an American film, television, and stage actor. Whalen was born in Washington D.C. in 1964, the youngest of four children, he was raised in Silver Spring/Olney, Maryland. He attended Sherwood High School and graduated from UCLA. He worked as a waiter while studying and performing at The Groundlings Theater. He appeared in commercials and in 1991, his first film, The People Under the Stairs. Whalen may be best known for the first "Got Milk?" commercial, in which his character tries in vain, after taking a large bite of a peanut butter sandwich, to answer a radio host's question about the famous Burr-Hamilton duel. Whalen also starred in a DiGiorno pizza commercial, in which his character and a friend enjoy a Chicago-style pizza in Tucson, Arizona, as well as the short-lived 2001 television program, Special Unit 2.