Stephen Reginald Bosustow (November 6, 1911 in Victoria, British Columbia – July 4, 1981[1]) was a Canadian-born American film producer from 1943 until his retirement in 1979.
He was one of the founders of United Productions of America (UPA) and produced nearly 600 cartoon and live-action shorts.
He is chiefly remembered for producing a string of Mr. Magoo and Gerald McBoing-Boing cartoons in the 1950s, three of which earned Academy Awards.
In 1968, he partnered with Nick to form Stephen Bosustow Productions, which produced films for theaters including the Oscar-winner Is It Always Right to Be Right?
(1971), an Academy Award-nominated animated film Legend of John Henry (1974), as well as Sesame Street and CBS-TV after school specials.