Ricky Martin, Alan Cumming, Sara Gilbert and Morrissey are among the 20 celebrities starring in PETA's “Vegetarian Icon” stamps.

PETA this week launched its 2013 edition of U.S. postage stamps featuring famous vegetarians and vegans.

“Rotten carcasses don't feel good inside … my body,” Cumming told Vegetarian Times. “I've also seen some horrible documentaries about the hormones and things that go into meat. On a health level, meat is so scary.”

Appearing on Ellen DeGeneres' daytime talk show last month, Martin said that he's a recent vegetarian.

“I've had high cholesterol since [I was] 19 years old,” Martin said. “I am not eating meat at all. And I feel amazing. No medication anymore. My cholesterol is stable, my head is clear, I sleep better, my energy is where it needs to be.”

Others featured include Pamela Anderson, Mayim Bialik, Joan Jett, Sarah Silverman, Bob Barker, Paul McCartney, Russell Simmons, Edie Falco, Casey Affleck, Belinda Carlisle, John Salley, Joaquin Phoenix, Viviene Westwood, Marco Antonio Regil, Sam Simon and Stella McCartney.

Stamp sheets can be purchased at PETA.org.