Don Messick (7 September 1926 – 24 October 1997) was an American voice actor. He is best known as the voice of Scooby-Doo and other classic Hanna-Barbera characters.
He voiced Muttley in the original series of Wacky Races, Dastardly & Muttley in Their Flying Machines, The Funtastic World of Hanna-Barbera, Wake Rattle & Roll and Yo Yogi! He also voiced Gravel Slag, Sawtooth, and Lil Gruesome. In Dastardly and Muttley he also voiced Zilly. He voiced Mumbly in The Mumbly Cartoon Show, Laff-A-Lympics and Yogi Bear and the Magical Flight of the Spruce Goose.