Vidalita

Vidalita is a 1949 Argentine comedy film directed and co-written by Luis Saslavsky and produced by Emelco during the classical era of Argentina cinema. It stars Mirtha Legrand as the title character, a girl who cross-dresses as a gaucho to be able to take charge of her grandfather's estate. This was considered transgressive for the time. Fernando Lamas stars as the captain of the fort, who falls in love with Legrand's character "to the point that he is willing to marry her without knowing if she is a man or a woman".

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.