David Niven
Sir Charles Lytton
Peter Sellers
Insp. Jacques Clouseau
Claudia Cardinale
The Princess Dala
Robert Wagner
George Lytton
Brenda De Banzie
Angela Dunning
John Le Mesurier
Defence Barrister (as John LeMesurier)
Michael Trubshawe
Felix Townes
Riccardo Billi
Aristotle Sarajos
Meri Welles
Monica Fawn (as Meri Wells)
Martin Miller
Pierre Luigi - Photographer
Fran Jeffries
Greek 'cousin'
John Bartha
Policeman (uncredited)
William Bryant
Policeman (uncredited)
Mario Fabrizi
Hotel Manager (uncredited)
Eugene Walter
Hotel Manager (voice) (uncredited)
Wael Zuaiter
Waiter (uncredited)
Giuliana Farnese
Holiday Guest at Cortina d'Ampezzo (uncredited)
Milena Zampana
Holiday Guest at Cortina d'Ampezzo (uncredited)
Vezio Natili
Holiday Guest at Cortina d'Ampezzo (uncredited)
Enrico Cesaretti
Holiday Guest at Cortina d'Ampezzo (uncredited)
Attilio Pelegatti
Holiday Guest at Cortina d'Ampezzo (uncredited)
Romano Milani
Policeman (uncredited)
Aristide Catoni
Costume Party Guest (uncredited)
