Top 10 Green Celebrities

Leonardo DiCaprio

This outspoken young star has been a driving force behind the green movement for over a decade. He lends his talents to projects like the climate change documentary The 11th Hour (which he narrated, co-produced and wrote) and the upcoming eco-friendly reality program "Greensburg" (he's the executive producer) airing on the Discovery Channel's Planet Green, which chronicles the green rebuilding of a town in Kansas that was destroyed by a tornado; he established the Leonardo DiCaprio Foundation which helps raise awareness of environmental issues; and he's often caught tooling around Tinseltown in his Toyota Prius hybrid. DiCaprio stays green at home, too-with his $3,200 eco-friendly toilet!

Hayden Panettiere

A teen queen she may be, but the star of the hit show Heroes is already making quite a name for herself as an environmental and animal activist. Panettiere made international news when she was issued an arrest warrant in Japan after protesting against whale and dolphin hunting in that country. She was subsequently given a a Genesis Award (which honors those in the entertainment industry who help spread the message of compassion for animals) by the Humane Society for her efforts. A few months later, she was back in action on behalf of animals, donating the clothes off her back to raise money and awareness for the Save the Whales Again Campaign. She's also been snapped by the paparazzi carrying reusable grocery bags-to her SUV, though, proving she still has some green lessons to learn.