Lady for a Day (1933) , Frank Capra

 May Robson plays Apple Annie, a slatternly Broadway apple peddler. Annie has a curious setup whereby she is able to finagle other street merchants and beggars to pony up part of their weekly earnings to her--yet she never seems to spend any of the money on herself. This is because Annie has a daughter named Louise (Jean Parker), who has been supported in luxury all her life by her mother. Louise has no idea who Annie really is; so far as she knows, her mother is Mrs. E. Worthington Manville, a Manhattan society matron. When Louise sends Annie a letter telling her that she's become engaged to a young Spanish nobleman named Carlos (Barry Norton), Annie is aghast: once Louise brings her fiance to New York, the jig will be up. Coming to the rescue is high-rolling gambler Dave the Dude (Warren William), who considers Annie his good-luck charm.