Shirley Booth (Juno) was cast in May 1958 (Eileen Herlie had been under consideration). Melvyn Douglas (Captain Boyle) was cast shortly thereafter (Max Adrian and film actor Steve Forrest had both been considered). Jack MacGowran, (Joxer Daly) was cast in June 1958. MacGowran’s casting was at the suggestion of Sean O’Casey (who wrote the play on which Juno is based). Nancy Andrews was cast in October.