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

Carl Jaffe

Michel

Herbert Lomas

Ladbrooke

Bruce Winston

Director of Clinic

Evelyn Ankers

Sanitarium Patient (uncredited)

Frank Atkinson

Reporter (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)