William Richard Werstine (born April 16, 1952), better known as Billy West, is an American voice actor, musician, singer and songwriter. His most notable voice roles include the title characters of Doug and The Ren & Stimpy Show, as well as the Futurama characters Philip J. Fry, Professor Farnsworth, Dr. Zoidberg, and Zapp Brannigan. In commercials, he is the current voice of the Red M&M and formerly voiced Buzz for Honey Nut Cheerios. He also voices established characters Bugs Bunny, Elmer Fudd, Popeye, Shaggy Rogers, Super Snooper, Muttley, and Woody Woodpecker, and was a cast member on The Howard Stern Show, during which time he was noted for his impressions of Larry Fine, Marge Schott, George Takei, and Jackie Martling.