An animated Pink Panther was created for the opening credits because writer and director Blake Edwards felt that the credits would benefit from some kind of cartoon character. David H. DePatie and Friz Freleng decided to personify the film's eponymous jewel, and the Pink Panther character was chosen by Edwards from over a hundred alternative panther sketches. The Pink Panther introduced in the opening credits became a popular film and television character in his own right, beginning with the cartoon short The Pink Phink (1964) the following year.
Blake Edwards and Peter Sellers enjoyed working together to develop Clouseau down to every move and nuance of voice and expression. "For years I'd been getting bits of what I wanted into films, as writer or director . . . but I had never had an area in which to exploit my ideas to the full," Edwards said. "Then along came Peter, a walking storehouse of madness, a ham with an almost surrealist approach to the insanity of things, and we found an immediate affinity."
Blake Edwards wanted Audrey Hepburn to play The Princess. Hepburn declined but she suggested that he cast her friend, Claudia Cardinale.
When presenting at a subsequent Oscar Awards ceremony, David Niven requested his walk-on music be changed from the "Pink Panther" theme, as "that was not really my film."
In the bath scene with Capucine and Robert Wagner, an industrial-strength foaming agent is used, which burned both of the stars' skin. Wagner, who was completely immersed at one point, became blind for four weeks.