Although it is not unusual in the history of film for an actor's singing voice to be dubbed by someone else this film is a rare instance where both leads, Rita Hayworth and Larry Parks, could not sing. Anita Ellis sang for Rita and Hal Derwin dubbed Parks.
In the newspaper montage, the third item in the Lyons Den column reads: "Save up your gas money and go over to Danny McGuire's place in Brooklyn. You'll see the current Vanity cover in the flesh." This is the plot for Cover Girl (1944), Rita Hayworth's previous movie for Columbia, so in effect the characters of Kitty Pendleton and Rusty Parker are playing at the same time in different venues, even though they're both played by the same person.
James Gleason plays Max Corkle, a character he originated in Here Comes Mr. Jordan (1941) (also directed by Alexander Hall and later remade as Heaven Can Wait (1978)). He was Academy Award nominated as Best Supporting Actor in the earlier movie, his only Academy Award nomination.