Revealing mistake: Kirsten Dunst's contact lenses can be seen multiple times during close-ups.
Revealing mistake: Marie-Antoinette is shown to always be naked under her chemise, as was customary back them. But Kirsten Dunst's underwear can be seen through it many times in the movie, especially when she is going to bed and the chemise stretches over her body.
Answer: That was just the custom then. Total nudity was considered inappropriate, if not immoral, even when bathing, which people did infrequently or not at all because it was thought to be unhealthy.
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