Love in the Afternoon is a 1957 American romantic comedy film produced and directed by Billy Wilder which stars Audrey Hepburn and Gary Cooper. Young cello student Ariane Chavasse (Audrey Hepburn) eavesdrops on a conversation between her father, widowed private detective Claude Chavasse (Maurice Chevalier), and his client, "Monsieur X" (John McGiver). After learning of his wife's daily trysts with American business magnate Frank Flannagan (Gary Cooper), Monsieur X announces he will shoot Flannagan later that day. Claude is nonchalant, regretting only the business he will lose (Flannagan is a well-known international playboy with a long history of numerous casual affairs). When Ariane cannot get the police to intervene (until after a crime has been committed), she decides to warn him herself.