Like Brad Pitt, Natalie Portman has used her celebrity as a platform for green do-goodery, although many Portman fans choose to focus on her films and romantic life. This green "swan" has been instrumental in bringing eco-fashion to the mainstream by backing for fur-, feather- and leather-free wardrobe choices and launching her own line of vegan shoes back in 2008. (Portman, who is in the running for this year's oscar for Best Actress, truly does walk the talk in this case as a practicing vegan.) A staunch supporter of animal rights, Portman co-starred with Jack Hannah in the 2007 documentary, “Gorillas on the Brink.”