Elle Fanning is an A-list actor who calls herself a "nepo sibling.” When she was just two years old, she appeared in her sister Dakota Fanning’s movie “I Am Sam,” playing a younger version of her character, Lucy. But for someone who’s been famous for nearly her entire life, there’s a bit of mystery surrounding Elle — and that’s intentional. During the Toronto International Film Festival in September, she sat down with Tom Power to talk about her latest film, “Sentimental Value,” which broke applause records when it premiered in Cannes earlier this year. She discusses the movie, her start in acting and why she wants to maintain some mystery around who she is.