Robert Rounseville made his mark in the world of entertainment when he worked on the Moira Shearer drama "Tales of Hoffmann" (1951). In 1937, he made his Broadway debut in the Rodgers and Hart musical "Babes in Arms." In 1951, he sang the title role in the world premiere of Igor Stravinsky's opera "The Rake's Progress" at La Fenice Opera House.