William Denby Hanna (July 14, 1910 – March 22, 2001) was an American animator, director, producer, voice actor, and cartoon artist, whose film and television cartoon characters entertained millions of people for much of the 20th century. In 1937, while working at Metro-Goldwyn-Mayer, Hanna met Joseph Barbera. The two men began a collaboration that resulted in some of animation's most iconic characters: Tom & Jerry, The Flintstones, The Jetsons, Huckleberry Hound, Yogi Bear, Top Cat, & many…