When Hollywood's leading ladies like Penélope Cruz, Emma Watson and Drew Barrymore want to go glam and green, they turn to vintage couture.
Not only is it environmentally conscious, but the celeb is practically guaranteed that no one else will be wearing the same Chanel gown from the designer's archives. Bonus!
So as we salute Earth Day this week, take a look at these celebs in their stunning duds in our gallery.