William Denby Hanna (July 14, 1910 – March 22, 2001) was an American animator, voice actor, and musician. Hanna and Joseph Barbera co-created Tom and Jerry and founded the animation studio and production company Hanna-Barbera, with Hanna providing the vocal effects for Tom and Jerry's title characters.
Hanna joined the Harman and Ising animation studio in 1930 and steadily gained skill and prominence while working on cartoons such as Captain and the Kids. In 1937, while working at Metro-Goldwyn-Mayer (MGM), Hanna met Barbera and formed a working relationship. In 1957, they co-founded Hanna-Barbera, which became the most successful television animation studio in the business, creating or producing programs such as The Flintstones, The Huckleberry Hound Show, The Jetsons, Scooby-Doo, The Smurfs, and Yogi Bear. In 1967, Hanna-Barbera was sold to Taft Broadcasting for $12 million (equivalent to about $116 million today) but Hanna and Barbera remained heads of the company until 1991.