Marilyn, My Love (1985)

Mitsy is a young actress who looks incredibly like Marilyn Monroe. During the shooting of her new film, she falls in love with Dan, her partner. But as he went to visit him in his dressing room, she caught him in the middle of an orgy. Disillusioned, she flees the set to take refuge with Renato, her ex-husband, who owns a magnificent villa on the shores of Lake Como.