David Niven

as Sir Charles Lytton

Peter Sellers

as Insp. Jacques Clouseau

Claudia Cardinale

as The Princess Dala

Capucine

as Simone Clouseau

Robert Wagner

as George Lytton

Brenda De Banzie

as Angela Dunning

Colin Gordon

as Tucker

John Le Mesurier

as Defence Barrister (as John LeMesurier)