The Major and the Minor (1942)

Synopsis
A woman's attempt to disguise herself as an underage girl mushrooms into a series of humorous deceptions in this romantic comedy. Ginger Rogers stars as Susan Applegate, a young woman living in New York who, nearly broke and sick of the city, decides to head home to Iowa. Lacking the money for a regular ticket, she pretends to be an unusually tall 11-year old girl named Sue-Sue in order to pay half-price. The train conductors catch on to her scheme, however, forcing her to take refuge in the car of Major Philip Kirby (Ray Milland). The kindly major virtually adopts the "lost little girl," and circumstances force Susan to play along and accompany him to the local military academy. There the fun begins, as she struggles to deal with the unwelcome romantic attentions of countless young cadets and her own increasing attraction to the engaged Major Kirby. The Major and the Minor was the first Hollywood feature helmed by the legendary Billy Wilder. ~ Judd Blaise, All Movie Guide