Gaétan Hart (born 1953, Canada) is a former lightweight/welterweight boxer from Buckingham, Quebec. Hart was a three time Canadian boxing champion. 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 an National Film Board of Canada documentary, the Steak. He now runs a Montreal boxing club.