In 1958, he played Nestor-Le-Fripe in the musical Irma La Douce, also starring in the role with the National Theatre in Washington DC, and on Broadway in 1960–1961. At the newly opened Chichester Festival Theatre, in 1962, he played the lead, Don John, in The Chances and then Ithocles in The Broken Heart, and in British television adaptations, he starred as Heathcliff in Wuthering Heights (1962) and, in a series of Roman plays titled The Spread of the Eagle, he played Mark Antony (1963). He later sang in a series of television specials written for him. Also on Broadway, he played the Count in The Rehearsal by Jean Anouilh (1963). In 1964 in London, he starred as Robert Browning in the musical Robert and Elizabeth, opposite Australian Soprano June Bronhill. He played in the dual role of Miguel de Cervantes and his fictional creation, Don Quixote, in the musical Man of La Mancha, first starring in the original London production of the musical and then on Broadway. He also starred as Abelard in the Broadway play Abelard and Heloise by Ronald Millar (1971) and as Georges in La Cage aux Folles in the 1980s.