Lady Oscar

Oscar François de Jarjayes was born female, but her father who longed for a son and a heir insisted she be raised as a boy, alongside, Andre Grandier, the grandson of her nanny. When Oscar matures into an adult she is selected to be captain of the guards at the Palace of Versailles under King Louis XVI and Marie Antonette. Oscar soon learns the problems of the monarchy and the plight of the poor which will eventually lead to the French Revolution... (imdb)