Now a days, becoming a vegetarian or vegan is a trend, according to PETA, around 5 percent of United States of America residents are vegetarian and 2.5% of residents are vegan. Even the most popular and hottest American actress are following this trend, which even includes big names like Now Carri Underwood , Alicia Silverstone and Christie Brinkley. Now, many American actress have followed this lifestyle for environmental, health or personal reasons, lets take a look at those celebrities: - 1. CARRI UNDERWOOD :- She is an American song writer, actress and singer. At the age of thirteen, she witnessed the killings of animals and then decided to be a vegetarian. 2. NATALIE PORTMAN :- This Israeli-born American actress decided to be vegan in the year 2009 after reading a book "Eating Animals", written by Jonathan Safran Foer. 3. ALICIA SILVERSTONE :- She is an American author, producer, actress and activist. She turned to vegan 17 years ago, when she was just 21. 4. ANNE HATHAWAY :- This American actress has an on and off relationship with veganism or vegetarianism. 5. ALYSSA MILANO :- She is a former singer, and American producer and actress. She is also a vegetarian and a strong and active supporter of PETA. 6. CHRISTIE BRINKLEY :- She is an American supermodel and a vegetarian. Brinkley supports animal rights. 7. CHIRISTINA APPLEGATE :- She is the spokeswoman of PETA and a vegetarian too. 8. HAYDEN PANETTIERE :- She is an American singer, model, actress and activist against the hunting of dolphin and whale. 9. GINNIFER GOODWIN :- She is an American film and tv actress, and she announced that she became a vegan in 2009. 10. KATE WINSLET :- She is an American actress, known for the movie "Titanic". She is an active supporter of PETA and a vegetarian. 11. KRISTEN BELL:- She is an American singer and actress, listed as the sexiest vegetarian in world by PETA in 2007. 12. AMY SMART :- She is an American actress and a vegetarian. 13. ROONEY MARA :- She is a talented American actress and the secret of her slim figure is that she follows a completely vegan diet. 14. JESSICA CHASTAIN :- She is an American actress and best known for her role in The Trees of Life, Take Shelter, The Help. Chastain is a feminist and she is a vegan. 15. OLIVIA WILDE :- She is an American actress, producer and model. She is a vegetarian since she was twelve years old and she says that being vegan is not easy but it makes you look better.