The Duke Steps Out(1929)

Millionaire's son Duke wants to be a champion boxer but takes time out to enroll in college when he sees co-ed Susie. The students wonder about his having a chauffeur and house full of servants. Susie likes him but, to get rid of her, his manager tells her Duke already has a New York chorus girl. As the students listen to a radio broadcast of his victorious fight from San Francisco, she learns that the student Duke is the boxer Duke and that there is no chorus girl.