The Richest Girl in the World is a 1934 romantic comedy film directed by William A. Seiter and starring Miriam Hopkins and Joel McCrea. Norman Krasna was nominated for the Academy Award for Best Story. It was remade in 1944 as Bride by Mistake with Laraine Day and Alan Marshal.
After seeing how happy Sylvia is with her new husband, Phillip Reginald Denny, she broaches the topic of setting a wedding date with Donald George Meeker, her longtime fianc. He is forced to admit that he has fallen in love with someone else and was getting up the nerve to tell her. Since she is not the least bit in love, she congratulates him. However, it is too late to cancel the party in which she had planned to announce their wedding.At the party, Dorothy and Sylvia continue pretending to be each other. Dorothy meets Anthony Tony Travers Joel McCrea and, after winning 60 from him playing billiards, takes a great liking to him. However, stung by Donalds confession that he was never sure he was attracted to her or her money, Dorothy decides to see if Tony would prefer her to the woman Tony thinks is her. She does all in her power to encourage him to court Dorothy, even lending him money to do so. Connors warns her that she is being foolish, that no man could resist choosing such a seemingly wealthy and beautiful woman, but Dorothy is adamant. Sylvia and Phillip reluctantly play along. ........
Source: Wikipedia