Jimmy Edwards as Sir Roderick Ryall/Hercules Ryall

Martita Hunt as Aunt Anna Rose

Naunton Wayne as Eustace Mills

Miles Malleson as Mr. Walsh

Susan Stephen as Mary O'Leary

Athene Seyler as Consuelo Howard

June Clyde as Mrs. Dorothy Cleghorn-Thomas

Brian Worth as Phillip Ryall

Mara Lane as Yvonne

Maire O'Neill as Bridgid O'Keefe

Toke Townley as William Burke

Irene Handl as Nanny

Kenneth Kove as Clergyman

Wilfrid Caithness as Doctor

Joseph Tomelty as Tim O'Leary

John McDarby as Sean, the Cabbie

Alfie Bass as Tipster