The Devil to Pay!

The Devil to Pay is a 1930 American PreCode romantic drama film directed by George Fitzmaurice and starring Ronald Colman, Frederick Kerr, Myrna Loy, and Loretta Young. It was written by Frederick Lonsdale and Benjamin Glazer.

After seeing his old girlfriend, theatre star Mary Crayle Loy, Willie meets family friend and heiress Dorothy Hope Young. He takes Dorothy and Susan to the Derby, where he and Dorothy have a wonderful time and he wins a great deal of money betting on a 501 longshot. Dorothy then breaks her engagement to Grand Duke Paul Cavanagh because she finds bankrupt Willie far more charming.Willie is reluctant to get involved with her, but when her father insists he will disinherit her if she marries Willie, he promptly proposes to her. She accepts, on condition that he promise to never see Mary ever again. Willie is unable to break the news to Mary by letter or telephone call, so he waits for her outside the theatre. She insists he come home with her, where he is finally able to tell her about his engagement. However, Mr. Hope gets Dorothy to agree to break up with Willie if he breaks his promise. He then hires a detective agency to watch the young man. He has Dorothy call Mary on the telephone. When Willie answers, she is heartbroken. ........

Source: Wikipedia