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Nocturne was producer Joan Harrison's first assignment for RKO. According to a Hollywood Reporter news item, Harrison, a former associate of Alfred Hitchcock, also worked on the screenplay, but the exact nature of her contribution has not been determined. RKO borrowed Lynn Bari from Twentieth Century-Fox for the production. Hollywood Reporter news items note that filming was to take place "all over Hollywood," including the Pantages Theatre, Hollywood Studio Club and the intersection of Hollywood and Vine. Modern sources add that the film grossed $568,000 in profits.