Daisy Lowe is fronting a new campaign for WWF.

The British model has revealed her natural side in a new photoshoot with world-renowned photographer Rankin to mark WWF's global Earth Hour event this Saturday 23 March.

At 8.30pm, hundreds of millions of people across the world will be turning off their lights for one hour, to take a stand for the future of the planet.

Daisy commented: ''If we enjoy our planet then I believe we need to take care of it. I hope that people across the UK and the world will take a moment this Earth Hour to appreciate both the beauty and the fragility of the natural world that we rely on so much.''

Rankin - who has shot the likes of Kate Moss and Kylie Minogue - has chosen to show the stunning eco-warrior star painted with a flower bursting into life from the cracked earth.

A host of celebrities are supporting this year's Earth Hour, including actress Jessica Alba and pop band McFly. Over 7,000 cities in 152 countries are expected to switch off as well as major landmarks like the Empire State building, the Eiffel Tower and the Great Wall of China.

To sign up and put yourself on the UK map go to wwf.org.uk/earthhour.