Deborah Kerr as Diana Ashmore

Yul Brynner as Major Surov

Jason Robards as Paul Kedes

Robert Morley as Hugh Deverill

Anne Jackson as Margie Rhinelander

Ron Howard as Billy Rhinelander

Flip Mark as Flip Rhinelander

Kurt Kasznar as Csepege

David Kossoff as Simon Avron

Gérard Oury as Teklel Hafouli

Marie Daëms as Françoise Hafouli

Anouk Aimée as Eva

Maria Urban as Gisela von Rachlitz

Siegfried Schürenberg as Von Rachlitz

Charles Regnier as Capt. Ornikidze

Iván Petrovich as Szabó Bácsi

Senta Berger as Serving Girl in Black Scarf

E.G. Marshall as Harold Rhinelander