"Ποτέ την Κυριακή" (Never on Sunday) is a 1964 Greek film directed by Jules Dassin. The story follows a free-spirited Greek woman named Ilya, played by Melina Mercouri, who works as a prostitute in Piraeus. The film explores themes of love, freedom, and cultural conflict as an American sailor, played by Dassin himself, tries to change her lifestyle. The film is notable for its vibrant portrayal of Greek life and its iconic music, including the famous title song. "Ποτέ την Κυριακή" received critical acclaim and won the Academy Award for Best Original Song, solidifying its place in cinematic history.