Evanna Lynch. As a young girl and avid Harry Potter fan, she was hospitalized for anorexia nervosa. She wrote to her idol, J.K. Rowling, who wrote back and provided much inspiration for her to deal with her eating disorder. Lynch identified strongly with Luna Lovegood and said she dreamed of playing her in the upcoming films. Rowling told her that if she beat anorexia, she would at least be able to have a shot at achieving that dream. Guess what? She did.