Tippi Hedren's first film. She was nineteen when she filmed it. She shows up in the final musical number for a couple of seconds as "Miss Ice Box". Her name doesn't appear in the credits.
Jean Spangler's final film. She disappeared the year before the film came out. Her whereabouts remain a mystery.
The scene where Joan Caulfield is arrested at the nightclub in her slip is almost identical to the scene in in Together Again (1944) where Irene Dunne is arrested at a nightclub in her slip, including lines of dialog.
"The Petty Girl" seems to have all the elements of a Paramount Pictures movie including the entire cast.
Robert Cummings' vocals were dubbed by Hal Derwin, whom studio heads frequently hired to ghost their non-singing leading men. Derwin also dubbed Cummings in Lucky Me (1954), as well as Gene Nelson in Lullaby of Broadway (1951) and She's Working Her Way Through College (1952), Larry Parks in Down to Earth (1947), Lee Bowman in Smash Up: The Story of a Woman (1947) and My Dream is Yours (1949) and Cliff Robertson in The Girl Most Likely (1957).