Kristen Stewart has stripped down to her underwear on the set of her latest film, 'Sils Maria'.


The 'Twilight' actress was spotted with her French co-star Juliette Binoche shooting a scene set in the Swiss mountains where they splashed around in a lake.


In 'Sils Maria', Stewart plays an assistant to Binoche's character, an ageing actress Maria Sanders who becomes fascinated with a younger thespian played by Chloe Moretz.


WATCH the video above for more.


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