Diamonds Are a Girl's Best Friend Diamonds Are a Girl's Best Friend "Diamonds Are a Girl's Best Friend" is a jazz song introduced by Carol Channing in the original Broadway production of "Gentlemen Prefer Blondes" (1949), which was written by Jule Styne and Leo Robin. It was based on a novel by Anita Loos. The song is perhaps most famously performed by Marilyn Monroe in the 1953 film "Gentlemen Prefer Blondes". Monroe's character, Lorelei Lee, has been followed on a Transatlantic ocean liner by a detective hired by her fiancé's father, who wants assurance that she is not marrying purely for money. He is informed of
Gentlemen Prefer Blondes (novel) prompting Judge Hibbard to buy her a ticket to Hollywood so that she could use her talent to become a professional actress. He also names her ‘Lorelei’ because he believed it expressed her personality. Major Falcon informs Lorelei that Bartlett is now a senator travelling to Vienna for a secret conference. Major Falcon reveals that his mission is to find out what Bartlett is up to in Vienna. He encourages Lorelei to become friends with Bartlett, discover official secrets, and pass them on to him. Meanwhile, Lorelei deplores Dorothy's wasting time with a man who is a mere tennis champion.