Three Coins in the Fountain (1954)

American girls dream of finding romance in Rome, but there is none for secretaries, Anita tells her replacement at the USDA. But Maria soon meets Prince Dino de Cessi at a party at her boss's home who invites her to fly to Venice in his private plane. Frances, who has been in Rome for 15 years as the secretary of a successful American writer who talks a lot like George Bernard Shaw and is just as elusive as Professor Henry Higgins in "My Fair Lady," tells her at first to say "no" and then decides that together they can handle the man nicknamed the predatory prince. Coins tossed in the Trevi Fountain can indeed work magic.