"The Screen Guild Theater" broadcast a 30 minute radio adaptation of the movie on March 22, 1943 with Judy Garland and Gene Kelly reprising their film roles.
Gene Kelly's film debut. It is known that Judy Garland got him the job after seeing him in the Broadway musical "Pal Joey".
Judy Garland's costume in the "Ballin' the Jack" number was originally worn by Eleanor Powell in Lady Be Good.
Eleanor Powell and Dan Dailey were originally supposed to star in this movie but were removed from the picture during rehearsals and replaced by Gene Kelly and Judy Garland.
George Murphy was originally cast as Harry Palmer, but he instead played Jimmy Metcalfe once the lead role went to Gene Kelly.
After initial previews, much of the film's ending was re-shot in order to make Gene Kelly's draft-dodging character Harry Palmer more sympathetic to wartime audiences. The scenes in which Palmer becomes a hero in combat were among those added.
Producer David O. Selznick had brought Gene Kelly to Hollywood from New York but couldn't find a suitable vehicle for him, so he allowed Kelly to sign a contract with MGM, where his career flourished beginning with this film.
Studio records show that Abe Dinovitch and Maude Erickson filmed a production number with Judy Garland, but it was cut before the final release. Similarly, Six Hits and a Miss was filmed in another number cut before release.
The first of three movie musicals in which Judy Garland and Gene Kelly starred in together, though they did appear separately in other movies and features.
This is the first of two movies in which a character says to Judy Garland, "Why didn't you tell me I was in love with you?" The second is Easter Parade, starring Fred Astaire.
This was the first film in which Judy Garland had her name billed before the title, which showed her growing importance and stature at MGM.
When it was decided that the costume worn by Mártha Eggerth while she performed "Do I Love You?" revealed too much cleavage, all close-ups of her during the number were blurred at the bodice.