Merle Oberon
— Jane Benson
Rex Harrison
— Dr. Freddie Jarvis
Ursula Jeans
— Millie
Robert Douglas
— John Flight
Louis Borel
— Pietro
Zena Dare
— Julie
Peter Haddon
— Lord Petcliffe
David Tree
— Journalist
Mackenzie Ward
— Guy
Elisabeth Welch
— Cabaret Singer
Carl Jaffe
— Michel
Herbert Lomas
— Ladbrooke
Wilfred Shine
— Frude
Gerald Nodin
— Cartwright
Bruce Winston
— Director of Clinic
Evelyn Ankers
— Sanitarium Patient (uncredited)
Frank Atkinson
— Reporter (uncredited)
Allan Brett
— Reporter (uncredited)
Meriel Forbes
— Miss Fortescue (uncredited)
Lewis Gilbert
— Minor Role (uncredited)
Ethel Griffies
— Miss Bates - the Governess (uncredited)
Wilfrid Hyde-White
— Dwight - Sanitarium Spokesman (uncredited)
Bill Shine
— Minor Role (uncredited)