Two American showgirls in the mood for love board a luxury liner to Paris. Engaged to be married, fair-haired Lorelei (Marilyn Monroe) is unknowingly tracked by a private investigator who was hired by her future father-in-law. But the detective only has eyes for her brunette friend, Dorothy (Jane Russell). Based on the Broadway musical starring Carol Channing, the film features the memorable tune “Diamonds Are a Girl’s Best Friend.”