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The working titles for this film were Careless and Purity Girl. The synopsis included in the copyright submissions incorrectly lists Jane Murfin with "original story and screenplay." Professional Sweetheart was the first film that Ginger Rogers made for RKO, although she did not sign a contract with the studio until the end of 1933, prior to making Flying Down to Rio. RKO borrowed Norman Foster from Fox for this production. According to a Film Daily news item, Dorothy Wilson was to be a cast member, but her appearance in the final film has not been confirmed. Modern sources state that black singer Etta Moten dubbed for Rogers during the "My Imaginary Lover" number. Modern sources add Grace Hayle (Reporter) to the cast, and Mel Berns (Makeup) and John Miehle (Still photographer) to the production credits. Contemporary credits list Alexander Kahle as still photographer, however.