David Niven

Character: Rex Allerton

Peggy Cummins

Character: Sally

Anne Vernon

Character: Jane

Herbert Lom

Character: André Amico

Charles Victor

Character: Jennings

Gordon Jackson

Character: Ralph

Felix Aylmer

Character: Winant

Hugh McDermott

Character: Rodney Wheeler

Stanley Maxted

Character: Oliver Stanton

June Clyde

Character: Viola

John Chandos

Character: Gulliver Kee

Theodore Bikel

Character: Parsimonious

Sebastian Cabot

Character: Suarez

Eugene Deckers

Character: Vernet

Andreas Malandrinos

Character: Fodor (as Andrea Malandrinos)

Nicholas Stuart

Character: American Radio Announcer

Michael Ward

Character: A Hotel Receptionist

Helena Pickard

Character: Sally's Mother

Marcel Poncin

Character: Priest

Alexis Chesnakov

Character: The Russian Man

Nelly Arno

Character: The Russian Woman

Gabrielle Blunt

Character: Doreen

Mark Baker

Character: Maxie

Boscoe Holder

Character: A Witch Doctor

John Glyn-Jones

Character: Prince Boris

Michael Alexander

Character: Minor Role (uncredited)

Humphrey Bogart

Character: Self (uncredited)

Michael Craig

Character: Cameraman Assistant (uncredited)

Betty Henderson

Character: Bit Part (uncredited)

Hattie Jacques

Character: Chambermaid (uncredited)

Alvar Liddell

Character: Self (uncredited)

Jean Marsh

Character: Dancer in Sally's Dream (uncredited)

Dido Plumb

Character: Man in Audience (uncredited)