Jessica's blue scooter is a Piaggio Vespa 150 VBA made 1958-60.
Location scenes filmed in Forza d'Agro, Sicily. The stunningly beautiful Sicilian locations were captured in Panavision and Technicolor by award-winning cinematographer Piero Portalupi, whose previous forays into Hollywood cinema had been David O. Selznick's remake of A Farewell to Arms (1957) and the Michael Curtiz-directed Francis of Assisi (1961), both shot in Italy.
The story is based on the novel by Flora Sandstrom, The Midwife of Pont Clery (New York, 1957). The novel is set in a Norman (French, not Italian) town in the early 20th century, rather than the film's contemporary setting.
Maurice Chevalier's songs are credited to three creators, one of whom was Negulesco's wife Dusty, a dark and dazzling model-starlet of the 1940s and popular pin-up of the war years (under the name Dusty Anderson) who quit motion pictures a few years after marrying Negulesco and became a well-known painter. One of the other two composers was Marguerite Monnot, who had written many of Edith Piaf's signature songs, including "Je ne regrette rien," and the hit musical Irma la Douce on which Billy Wilder based his 1963 film. The third credit went to one of Italy's most acclaimed film scorers, Mario Nascimbene, who wrote the score for this film as well as such major productions as The Vikings (1958) and Room at the Top (1959).