Gaétan Hart (born November 9, 1953 in Buckingham, Quebec) is a former lightweight/welterweight boxer from Canada, who was a three time boxing champion for his country. He lost his only world title fight against Aaron Pryor in 1980. Boxer Cleveland Denny died 16 days after being knocked out by Hart in 1980.In 1992, he was featured in a National Film Board of Canada documentary, the Steak, by Pierre Falardeau.