Black sheep Alicia Silverstone has bared all and stripped off in support of an animal rights charity.

The Clueless actress did a naked photoshoot to encourage people to stop using wool.

In the advert for animal rights organisation PETA, which will be put up in New York's Times Square, the 40-year-old clutches a sheep mask and stares seductively at the camera. The caption reads: "I'd rather go naked than wear wool."

"Wear your own skin. Let animals keep theirs."

This is the second time Alicia has bared all for the camera in aid of PETA. In 2008 she appeared in another nude ad and discussed being a vegetarian. She is not the first celebrity to strip naked for the camera in aid of the animal rights organisation.

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