By ELEANOR GOWER
She famously stripped off for a sultry kissing scene in a Brazilian lake with ex-boyfriend Robert Pattinson in the fourth Twilight film Breaking Dawn: Part One.
And Kristen Stewart has just embarked on another risqué lake shoot - but this time with a woman.
The 23-year-old actress took off her trousers and T-shirt to reveal a black bra and white underwear to film a scene for forthcoming film Sils Maria in the Swiss mountains.
After getting her underwear wet, the star's black thong was clearly visible through the white shorts as she strolled in the shallows.
However, Kristen's French co-star Juliette Binoche happily went nude as she plunged into the chilly lake, confidently displaying her svelte figure.
The 49-year-old Oscar-winning actress seemed to have a greater tolerance for the temperature than her Californian-born co-star, with Kristen looking shocked as she took the plunge.