Woody Harrelson, one of the many vegan friends Alicia mentions in her book, is also committed to saving the planet. The "Cheers" actor was arrested in 1996 when he climbed the Golden Gate Bridge to call for the protection of redwood trees. Andrew H. Walker/GettyImages.com - January 19, 2009
Celebs Save the Planet
Check out pics of Hayden Panettiere, Brad Pitt, and more stars who are doing their part.