Valentina Cortese

Maria Brentano / Brent / Lena Collins

Serge Reggiani

Louis Balan

Audrey Hepburn

Nora Brentano

Megs Jenkins

Penny

Irene Worth

Miss Jackson

Reginald Tate

Inspector Eliot

Charles Goldner

Anselmo

Angela Fouldes

Nora Brentano as a child

Simone Silva

Undetermined (Minor Role - Paris Sequence) (uncredited)

Norman Williams

Sergeant Newcome

Michael Shepley

Manager of the British Pavilion

Athene Seyler

Mrs. Reginald Kellick

Sydney Tafler

Syd Burnett

Geoffrey Hibbert

Steenie

John Ruddock

Daly