Manhattan is a 1979 American romantic comedy-drama film directed by Woody Allen and produced by Charles H. Joffe. The screenplay was written by Allen and Marshall Brickman. Allen co-stars as a twice-divorced 42-year-old comedy writer who dates a 17-year-old girl (Mariel Hemingway) but falls in love with his best friend's (Michael Murphy) mistress (Diane Keaton). Meryl Streep and Anne Byrne also star.