Orlando Bloom's model girlfriend Miranda Kerr has stripped off and chained herself to a tree - to raise awareness of the diminishing numbers of koala bears in her native Australia.
The stunning 26-year-old has gone au naturel on the cover of the Aussie edition of Rolling Stone magazine to boost the campaign to help save the cute creatures' habitat.
And the catwalk queen hopes her risque photoshoot will help attract more people to join her koala crusade.
She tells the mag, "I feel strongly about the need to protect our natural environment because it supports our life - it really is that simple.
"It's a sad thing - there are only about 100,000 koalas left in Australia. Something like 80 per cent of the koalas' habitat has been destroyed since Europeans arrived in Australia.
"The great thing about having people recognise you is you can try to make a positive difference - that's what I'm trying to do, especially for young women."