Thanksgiving is a time for family, friends and turkey, right? Well, if you're like one of many celebrities, you may be passing on the turkey and opting for an extra helping of mashed potatoes or stuffing instead.

As vegetarian and vegan diets have become more popular in recent years, Hollywood has naturally jumped on the growing trend and a bunch of A-listers have recently made the switch , joining plenty of celebrities who have long been advocates of the meat-free life. From legends like Paul McCartney to legends in their own mind like Courtney Stodden, check out our roundup of 16 celebrities who will be having tofurkey this Thanksgiving!

1. Tobey Maguire

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Tobey has been a vegetarian for many years and is working towards adopting a completely vegan diet. However, he said he goes full-blown vegetarian when making weight alterations for movie roles, such as bulking up for Spiderman or slimming down for Seabiscuit.

2. Anne Hathaway

Anne has been an on-again, off-again vegetarian for most of her life, but has gone meat free for the last three years.

3. Carrie Underwood

Carrie gave up meat at the age of 13 because she said she couldn't fathom eating one of her own animals. PETA seemed to agree with her as well; they named her Sexiest Vegetarian in 2005 and 2007.

4. Christian Bale

Christian took on vegetarianism when he was just nine years old after reading Charlotte's Web. It also didn't hurt that his father was an animal rights activist who taught him to be compassionate towards all creatures of the earth.

5. Ellen DeGeneres

Ellen had already been a vegetarian for several years, but made the plunge to veganism in 2008. She now has a section on her website with tips and recipes called Going Vegan With Ellen.

6. Kal Penn

Here's some irony for you: Kal is best known for getting stoned and hunting for burgers in Harold & Kumar Go to White Castle, but the actor is a vegetarian in real life.

7. Jack Johnson

The mellow singer-songwriter is a lifelong vegetarian and lives in an eco-friendly residence in Hawaii.

8. Kristen Bell

Kristen's favorite vegetable? Brussel sprouts! The starlet gave up meat several years ago and was eventually given the honor of PETA's Sexiest Vegetarian.

9. Kate Winslet

Kate has been a lifelong vegetarian and an avid supporter of PETA.

10. Courtney Stodden

She may not be a fan of clothing, but Courtney is definitely a fan of animals. She's released several scantily clad videos on the perks of being a vegetarian, which she said she became last year (i.e. once the cameras started rolling on her as a child bride). Separate question: Why did PETA pick HER as a spokeswoman?!

11. Pamela Anderson

"I think it's pretty hypocritical you're so into animal rights since you've been torturing your own beaver for years," quipped comic Jeff Ross at Pam's Comedy Central roast in 2005. Nevertheless, Pam has tirelessly donated her time as an animal rights activist and PETA supporter while remaining a lifelong vegetarian.

12. Paul McCartney

Paul has been a practicing vegetarian for more than 40 years and has contributed to numerous animal rights campaigns.

13. Jessica Chastain

Jessica was a co-winner this year for PETA's Sexiest Vegetarian Celebrity contest this year. The Help star has been a vegetarian for 15 years and a vegan for five. "I don't want to torture anything," she said. "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."

14. Woody Harrelson

Woody joined Jessica as a co-winner of PETA's Sexiest Vegetarian Celebrity this year. We're not sure if Woody and "sexy" go in the same sentence anymore, but hey, not our award. The actor has been a vegetarian for nearly 30 years.

15. Natalie Portman

Natalie is an advocate for animal rights and has been a vegetarian since childhood. She also refuses to wear fur, feathers or leather.

16. Steve-O

You'd think someone who staples their nuts together doesn't have much regard for himself or anything living, but Steve-O is a vegan! Now that he's quit drinking and drugs, the former Jackass star said he's trying to compensate for his previously over-the-top lifestyle.

Are there any other celebrity vegetarian/vegans that we missed? Let us know in the comments section!

Photos courtesy of Getty Images