Avanti!

In this hilarious romantic comedy from writer/director Billy Wilder and screenwriter I.A.L. Diamond, wealthy American Wendell Armbruster, Jr. (Jack Lemmon) discovers true love when he is summoned to Italy after a car accident claims the lives of his father and his father's secret mistress. As the mistress' daughter (Juliet Mills) also arrives in town, the bodies of both of their parents disappear, and the two instant foes are brought together in a baffling mystery... and an affair of the heart!