Unlike many of the children on this list, Cole isn't a serial killer or a sociopath. But he is known for his creepy line, "I see dead people." And in fact, he does. Cole reveals to his psychologist, Crowe (Bruce Willis), that he sees ghosts walking around the living. Fun fact: Toni Collette, who stars in Hereditary, also plays a mother in this iconic M. Night Shyamalan film.