William Hanna worked in the entertainment industry.
Joseph Roland `` Joe '' Barbera ( [ bɑrˈbɛrə ] or [ ˈbɑrbərə ] ; [ barˈbɛːra ] ; March 24 , 1911 -- December 18 , 2006 ) was an American animator , director , producer , storyboard artist , and cartoon artist , whose film and television cartoon characters entertained millions of fans worldwide for much of the 20th century . William Hanna . In 1937 , while working at Metro-Goldwyn-Mayer ( MGM ) , Hanna met Joseph Barbera . In 1957 , they co-founded Hanna-Barbera , which became the most successful television animation studio in the business , producing programs such as The Flintstones , The Huckleberry Hound Show , The Jetsons , Scooby-Doo , The Smurfs , and Yogi Bear .