Judy was already a six-year veteran of the screen when she starred with Gene Kelly in 1942's For Me and My Gal. It was 30-year-old Kelly's first film, and "old-pro" Judy was an immense help to him as he was learning the ins and outs of movie-making, a fact he never forgot.  Judy was also glad of the opportunity, at the age of 20, to have a role as an adult, playing opposite a man, not a teenager.
For Me and My Gal is a sentimental treatment of vaudeville performers at the outbreak of WWI, but its banal qualities are somewhat overcome by the musical numbers -- eighteen in all -- including such standards as "Oh, You Beautiful Doll", "Till We Meet Again", and "After You've Gone."  And, of course, the stars' rendition of the title song is infinitely watchable.