 David NivenSir Charles Lytton | Sir Charles Lytton |
 Peter SellersInsp. Jacques Clouseau | Insp. Jacques Clouseau |
 Claudia CardinaleThe Princess Dala | The Princess Dala |
 CapucineSimone Clouseau | Simone Clouseau |
 Robert WagnerGeorge Lytton | George Lytton |
 Brenda De BanzieAngela Dunning | Angela Dunning |
 Colin GordonTucker | Tucker |
 John Le MesurierDefence Barrister (as John LeMesurier) | Defence Barrister (as John LeMesurier) |
| JJames LanphierSaloud | Saloud |
 Guy ThomajanArtoff | Artoff |
 Michael TrubshaweFelix Townes | Felix Townes |
 Riccardo BilliAristotle Sarajos | Aristotle Sarajos |
 Meri WellesMonica Fawn (as Meri Wells) | Monica Fawn (as Meri Wells) |
 Martin MillerPierre Luigi - Photographer | Pierre Luigi - Photographer |
 Fran JeffriesGreek 'cousin' | Greek 'cousin' |
 John BarthaPoliceman (uncredited) | Policeman (uncredited) |
 William BryantPoliceman (uncredited) | Policeman (uncredited) |
 Mario FabriziHotel Manager (uncredited) | Hotel Manager (uncredited) |
 Eugene WalterHotel Manager (voice) (uncredited) | Hotel Manager (voice) (uncredited) |
| WWael ZuaiterWaiter (uncredited) | Waiter (uncredited) |
 Giuliana FarneseHoliday Guest at Cortina d'Ampezzo (uncredited) | Holiday Guest at Cortina d'Ampezzo (uncredited) |
| MMilena ZampanaHoliday Guest at Cortina d'Ampezzo (uncredited) | Holiday Guest at Cortina d'Ampezzo (uncredited) |
 Vezio NatiliHoliday Guest at Cortina d'Ampezzo (uncredited) | Holiday Guest at Cortina d'Ampezzo (uncredited) |
 Enrico CesarettiHoliday Guest at Cortina d'Ampezzo (uncredited) | Holiday Guest at Cortina d'Ampezzo (uncredited) |
 Attilio PelegattiHoliday Guest at Cortina d'Ampezzo (uncredited) | Holiday Guest at Cortina d'Ampezzo (uncredited) |
 Romano MilaniPoliceman (uncredited) | Policeman (uncredited) |
 Aristide CatoniCostume Party Guest (uncredited) | Costume Party Guest (uncredited) |
