Kristen Johnston has become the latest celebrity to pose nude for PETA. The former "3rd Rock from the Sun" star - who recently caused concern with her drastic weight loss - poses as Lady Godiva, naked and astride a horse, in the photograph which debuted in New York's Central Park Thursday.

The 41-year-old actress has joined forces with the animal rights group to campaign against the horse-drawn carriage rides on offer in New York.

Two-time Olympic gold medalist Amanda Beard poses nude for the latest PETA(People for the Ethical Treatment of Animals) ad.

Beard's ad, "Be comfortable in your own skin, don't wear fur," was released just a few days before the Olympics at the Athletes Village in Beijing, where she was preparing for the 2008 Olympics.

Paul McCartney proudly declares he is a vegetarian. In a new People for the Ethical Treatment of Animals (PETA) ad campaign entitled "I Am A Vegetarian," the Beatles legend has strike a pose and dishes why he decided to stop eating meat.

In the ad, the 65-year-old rock royalty states: