Avanti!
"When someone knocks on your door and says permesso?... be careful before you say Avanti!"
A successful businessman goes to Italy to arrange for the return of his tycoon-father's body only to discover dad died with his mistress of long standing.
Directors: Billy Wilder
Writers: Billy Wilder, I.A.L. Diamond, Samuel A. Taylor
Cast
IMDB: tt0068240