The former President changed his diet drastically to becoming vegan for his health. He has lost close to 30 pounds by changing his eating habits alone.
As a longtime vegetarian, inspired by watching her parents castrate calves as a child, the popular country singer was inspired by a friend to take it one step further in her diet.
Inspired by the book "Eating Animals," she went from being a vegetarian to becoming a vegan. She believes that what we eat shows who we are and what our beliefs are.
This heavyweight champion credits becoming a vegan for losing 140 pounds and helping his body get back into a fighter's body. His wife was trying it for a couple weeks, so he did also and has never looked back.
The beloved talk show host admits thought that becoming vegan wasn't easy. Her first try was back in 1997, but only lasted six months. It wasn't until 2008 that the vegan diet stuck, and since then she's stuck to it ever since.
Portia de Rossi
She thought meat was a necessary part of life, until her and Ellen DeGeneres moved to a farm in California. Her "aha moment" was when the cows and calves she owned began greeting a new horse by touching noses in a single-file line.
Three years after her classic role in "Clueless" she changed her diet to a vegan diet. She now admits that she sleeps like a baby every night and never has to worry about her weight.
This entertainer was inspired by the comedian Rosie O'Donnell, after her change to a vegan diet returned her body to good health after a heart attack. He is now urging Justin Bieber to join in.
Joaquin has been a vegan since the age of three, and he was joined at that young age by his siblings after watching the killing of fish on a fishing boat. He is an active participant with PETA.
Told by a woman on a bus that he was lactose-intolerant, he stopped dairy for three days and the rest is history. Now an active member of PETA, he continues to be a die-hard vegan.
This intense singer considers herself to only be about 80% vegan, but highly trusts her diet expert Dr. Joel Furhman. She believes that food is medicine for the body.
Russell Brand changed his diet after watching a documentary that showed how animal products affect humans well being and health. He was even named PETA's "Sexiest Vegetarian Celebrity" in 2011.