 Franco NeroCarabinieri Colonel Dante Matucci | Carabinieri Colonel Dante Matucci |
 Anthony QuinnBruno Manzini | Bruno Manzini |
 Martin BalsamCaptain Steffanelli | Captain Steffanelli |
 Claudia CardinaleElena Leporello | Elena Leporello |
 Sybil DanningLili Anders | Lili Anders |
 Christopher LeePrince Baldasar, the Director of Counterintelligence | Prince Baldasar, the Director of Counterintelligence |
 Cleavon LittleMajor Carl Malinowski, USMC | Major Carl Malinowski, USMC |
 Paul L. SmithThe Surgeon | The Surgeon |
 John SteinerCaptain Roditi | Captain Roditi |
 Eli WallachGeneral Leporello | General Leporello |
 Renzo PalmerCarabinieri Major Giorgione | Carabinieri Major Giorgione |
 Anita StrindbergPrincess Faubiani | Princess Faubiani |
 Marino MaséCaptain Rigoli | Captain Rigoli |
 Jacques HerlinWoodpecker | Woodpecker |
 Fortunato ArenaGeneral Pantaleone | General Pantaleone |
 John StacyConcierge | Concierge |
| AAndrea EsterhazyMinister of Defense | Minister of Defense |
 Larry DolginCaptain Roditi (voice) (uncredited) | Captain Roditi (voice) (uncredited) |
| TTony BrandtGianni Bandanelli, Pantaleone's Lawyer (uncredited) | Gianni Bandanelli, Pantaleone's Lawyer (uncredited) |
 Omero CapannaHitman (uncredited) | Hitman (uncredited) |
 Attilio DottesioParty Guest of Manzini's (uncredited) | Party Guest of Manzini's (uncredited) |
 Tom FelleghyMan at Funeral (uncredited) | Man at Funeral (uncredited) |
 Alfonso GigantiMan at Funeral (uncredited) | Man at Funeral (uncredited) |
 Margherita HorowitzWife of Minister of Defense (uncredited) | Wife of Minister of Defense (uncredited) |
| GGitte LeePrincess Baldasar (uncredited) | Princess Baldasar (uncredited) |
 Nello PazzafiniManzini's Bodyguard (uncredited) | Manzini's Bodyguard (uncredited) |
 Amedeo SalamonBanquet Guest (uncredited) | Banquet Guest (uncredited) |
 Frank NuyenMan at Pantaleone's funeral (uncredited) | Man at Pantaleone's funeral (uncredited) |
