Alicia Silverstone

The actress isn't clueless when it comes to animals and not eating meat/Getty Images

Carrie Underwood

The American Idol winner and country superstar is passionate about animals/Getty

Casey Affleck

The actor (and Ben's brother) says the meat industry is a violent one--one of the reasons why he doesn't eat meat/Getty

Georges Laraque

The NHL powerhouse says he has a soft spot for animals/Getty

Hayden Panettiere

The actress is an avid animal rights activist and spokesperson for Save The Whales Again!/Getty

Owain Yeoman

The 'Mentalist' star told Peta: After learning about the cruel treatment of animals who are raised and killed for food, I could no longer support such a violent industry. "The fact that the meat on my plate was once a living, breathing creature became something I could no longer ignore or justify as food." Getty Images

Pam Anderson

The sex symbol has been an animals rights and anti-fur activist for years/Getty

Sir Paul McCartney

The music legend says he became a vegetarian while out fishing years ago/Getty

Portia DeRossi

The actress is Vegan along with wife Ellen DeGeneres/Getty Images

Emily Deschanel

Make no 'Bones' about it, this actress is Vegan/Getty Images

Kristen Wiig, Sexiest Vegetarian 2011

The SNL and "Bridesmaids" star was named one of PETA's sexiest vegetarians of 2011. (Credit: Michael Buckner/Getty Images)

Russel Brand, Sexiest Vegetarian 2011

The "Arthur" star and husband of Katy Perry was named one of PETA's sexiest vegetarians of 2011. (Photo by Dave Hogan/Getty Images)

Jessica Chastain, Sexiest Vegetarian 2012

According to PETA, Jessica, who stole the show in The Help, has been vegetarian for 15 years and vegan for five. "I don't want to torture anything," she says. "It's about trying to live a life where I'm not contributing to the cruelty in the world. While I am on this planet, I want everyone I meet to know that I am grateful they are here." (Photo Credit: Mike Coppola/Getty Images Entertainment)

Woody Harrelson: Sexiest Vegetarian, 2012

According to PETA, Woody, known for his recent role as Haymitch in the blockbuster hit The Hunger Games, has been vegan for nearly three decades. He had his "aha" moment when he was trying to make it as an actor in New York: "I was on a bus and some girl sees me blowing my nose, I had acne all over my face, which I'd had for years and years. And she's like: 'Hey, you're lactose intolerant. If you quit dairy, all these symptoms you got will be gone in three days.' I was like 24. And I was like, No way. But three days later: gone." (Photo credit: Kevork Djansezian/Getty Images Entertainment)