 | David Niven als Sir Charles Lytton |
 | Peter Sellers als Insp. Jacques Clouseau |
 | Claudia Cardinale als The Princess Dala |
 | Capucine als Simone Clouseau |
 | Robert Wagner als George Lytton |
 | Brenda De Banzie als Angela Dunning |
 | Colin Gordon als Tucker |
 | John Le Mesurier als Defence Barrister (as John LeMesurier) |
 | James Lanphier als Saloud |
 | Guy Thomajan als Artoff |
 | Michael Trubshawe als Felix Townes |
 | Riccardo Billi als Aristotle Sarajos |
| Meri Welles als Monica Fawn (as Meri Wells) |
 | Martin Miller als Pierre Luigi - Photographer |
 | Fran Jeffries als Greek 'cousin' |
 | John Bartha als Policeman (uncredited) |
 | William Bryant als Policeman (uncredited) |
 | Mario Fabrizi als Hotel Manager (uncredited) |
 | Eugene Walter als Hotel Manager (voice) (uncredited) |
| Wael Zuaiter als Waiter (uncredited) |
 | Giuliana Farnese als Holiday Guest at Cortina d'Ampezzo (uncredited) |
 | Milena Zampana als Holiday Guest at Cortina d'Ampezzo (uncredited) |
 | Vezio Natili als Holiday Guest at Cortina d'Ampezzo (uncredited) |
 | Enrico Cesaretti als Holiday Guest at Cortina d'Ampezzo (uncredited) |
 | Attilio Pelegatti als Holiday Guest at Cortina d'Ampezzo (uncredited) |
 | Romano Milani als Policeman (uncredited) |
 | Aristide Catoni als Costume Party Guest (uncredited) |
| Blake Edwards | Director |
| Reg Allen | Set Decoration |
| Philip H. Lathrop | Director of Photography |
| Henry Mancini | Original Music Composer |
| Arrigo Breschi | Set Decoration |
| Fernando Carrere | Art Direction |
| Yves Saint Laurent | Costume Design |
| Maurice Richlin | Screenplay |
| Dick Crockett | Producer |
| Ralph E. Winters | Editor |
| Blake Edwards | Screenplay |
| Martin Jurow | Producer |
| Alexander Fisher | Sound Designer |
| Jack Stevens | Set Decoration |
| Gilbert D. Marchant | Sound Effects Editor |
| Richard Carruth | Music Editor |
| Michele Trimarchi | Makeup Artist |
| Ottavio Oppo | Assistant Director |
| James Lanphier | Dialect Coach |
| Annalisa Nasalli-Rocca | Wardrobe Supervisor |
| Betty A. Griffin | Script Supervisor |
| Amalia Paoletti | Hairstylist |
| Cliff King | Camera Operator |
| Hermes Pan | Choreographer |
| Mickey Lennon | Dressing Prop |
| William Hamilton | Boom Operator |
| Lee Zavitz | Special Effects |
| Dick Crockett | Stunts |
| Virgilio Ponti | Stunts |
| Nosher Powell | Stunts |
