Charlton Heston as Maj. Matt Lewis

Ava Gardner as Baroness Natalie Ivanoff

David Niven as Sir Arthur Robertson

Flora Robson as Dowager Empress Tzu-Hsi

John Ireland as Sgt. Harry

Harry Andrews as Father de Bearn

Leo Genn as Gen. Jung-Lu

Robert Helpmann as Prince Tuan

Kurt Kasznar as Baron Sergei Ivanoff

Philippe Leroy as Julliard

Paul Lukas as Dr. Steinfeldt

Elizabeth Sellars as Lady Sarah Robertson

Massimo Serato as Garibaldi

Jacques Sernas as Maj. Bobrinski

Jerome Thor as Capt. Andy Marshall

Geoffrey Bayldon as Smythe

Joseph Fürst as Capt. Hanselman

Walter Gotell as Capt. Hoffman

Jūzō Itami as Col. Shiba

Mervyn Johns as Clergyman

Alfredo Mayo as Spanish Minister

Martin Miller as Hugo Bergmann

Conchita Montes as Mme Gaumaire

José Nieto as Italian Minister

Eric Pohlmann as Baron von Meck

Aram Stephan as Gaumaire

Robert Urquhart as Capt. Hanley

Lynne Sue Moon as Teresa

Burt Kwouk as Old Man (voice)

Mike Steen as Undetermined Role (uncredited)

Lucy Appleby as Martha (uncredited)

Félix Dafauce as Dutch Minister (uncredited)

Andrea Esterhazy as Austrian Minister (uncredited)

Carlos Casaravilla as Japanese Minister (uncredited)

R.S.M. Brittain as Sergeant Major (uncredited)

Michael Chow as Chiang (uncredited)

Chow Siu-Loi as Court Boxer (uncredited)

Mitchell Kowall as US Marine (uncredited)

Paul Naschy as Extra (uncredited)

Fernando Sancho as Belgian Minister (uncredited)

Lucille Soong as Concubine (uncredited)

Robert Rietti as Spanish Minister (voice) (uncredited)

Milton Reid as Boxer (uncredited)

Nicholas Ray as US Minister (uncredited)

Alfred Lynch as Gerald (uncredited)

John Moulder-Brown as Tommy (uncredited)

Guillermo Vera as El hombre del carrito (uncredited)

George Wang as Boxer Chief (uncredited)