史蒂芬·博萨斯托，Stephen Reginald Bosustow (November 6, 1911, Victoria, British Columbia – July 4, 1981) 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, two of which earned Academy Awards. He is the only film producer in history who received all the Oscar nominations in one category (1957), guaranteeing him the winning Oscar. Magoo's Puddle Jumper was the eventual winner.In 1963 Bosustow Entertainment was established and his son Nick Bosustow produced the 1983 Emmy Award winner for CBS-TV, Wrong Way Kid, starring Dick Van Dyke. Also in 1963, Bosustow formed a subsidiary for animated commercials in Hong Kong with his son Tee Bosustow. 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.Bosustow has two sons. Nick, with whom he formed a production company, is now a recruiter for the Peace Corps after serving as a volunteer in Guatemala and Suriname. His other son, Tee, has been working on a documentary focusing on his late father's animation studio, titled “UPA: Magoo, McBoing Boing, and Modern Art”. He documents the film's progress at the UPA Legacy Project site. Tee also hosts the animation podcast site, Toon In! ... to the World of Animation! with interviews from all around the world, featuring animation artists from UPA and other studios, as well as independent animators and historians.The name Bosustow is Cornish, meaning "dwelling of Ustoc" in the Cornish language