Christopher Lee
Prince Baldasar, the Director of Counterintelligence
Martin Balsam
Captain Steffanelli
Eli Wallach
General Leporello
Claudia Cardinale
Elena Leporello
Anthony Quinn
Bruno Manzini
Jacques Herlin
Woodpecker
Franco Nero
Carabinieri Colonel Dante Matucci
John Steiner
Captain Roditi
Larry Dolgin
Captain Roditi (voice) (uncredited)
Sybil Danning
Lili Anders
Nello Pazzafini
Manzini's Bodyguard (uncredited)
Renzo Palmer
Carabinieri Major Giorgione
Marino Masé
Captain Rigoli
Andrea Esterhazy
Minister of Defense
Tom Felleghy
Man at Funeral (uncredited)
Paul L. Smith
The Surgeon
Attilio Dottesio
Party Guest of Manzini's (uncredited)
John Stacy
Concierge
Cleavon Little
Major Carl Malinowski, USMC
Anita Strindberg
Princess Faubiani
Margherita Horowitz
Wife of Minister of Defense (uncredited)
Omero Capanna
Hitman (uncredited)
Fortunato Arena
General Pantaleone
Alfonso Giganti
Man at Funeral (uncredited)
Tony Brandt
Gianni Bandanelli, Pantaleone's Lawyer (uncredited)
Amedeo Salamon
Banquet Guest (uncredited)
Gitte Lee
Princess Baldasar (uncredited)
Frank Nuyen
Man at Pantaleone's funeral (uncredited)