No. 2 Leonardo DiCaprio
Leonardo DiCaprio is one of the biggest eco-friendly celebs in Hollywood, taking every opportunity he can to show his green side and encourage others to do the same. He even won the International Green Film Award at the Cinema for Peace 2009 Gala for his movie The 11th Hour. He was the first ever winner of the Big Green Help blimp at the Nickelodeon Kids' Choice Awards and now is passionately dedicated to helping save arctic tigers.