Although most of the roles in the film were played by British Shakespearean actors who were not noted for singing ability, Ian Richardson did go on to be nominated for a Tony for his performance as Henry Higgins in the 20th anniversary production of "My Fair Lady", and the picture did feature several actors, among them Julie Gregg, Gino Conforti, and the muleteer chorus, who did have singing voices. Gino Conforti had been a member of the original stage production cast, and Julie Gregg had also appeared on Broadway in a musical.