Natalie Portman - Vegan Celebrity

Portman, a vegetarian since childhood, turned full-on vegan after reading Jonathan Safran Foer's book "Eating Animals" last year (although she went back to being a vegetarian during her pregnancy) . She blogged on The Huffington Post, "The human cost of factory farming -- both the compromised welfare of slaughterhouse workers and, even more, the environmental effects of the mass production of animals -- is staggering."

She traveled to Rwanda to film a documentary about endangered gorillas, she's designed her own vegan shoes, and is now even sporting an eco-friendly engagement ring from husband Benjamin Millepied. Portman's passion for the environment began at a young age - she can even  be seen dancing in a very...uniqueenvironmental video as a World Patrol Kid.