Emma Watson is doing her bit for the environment by posing in the nip!
The photos were taken by James Houston to raise awareness for the environment.
The photos are to be published in his new 'Natural Beauty' book.
Other celebrities to pose for Houston's project include Christy Turlington, Adrian Grenier, Brooke Shields, Arizona Muse and Elle Macpherson.
22 year old Emma seems to be pretty comfortable posing nude, but has strongly denied rumours that she's to star as Anastasia Steele in the '50 Shades of Grey' movie.
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