Fifty-some-odd years ago, a woman named Rosemary gave birth to a baby who did not bode well for the future on humanity, what with the baby being the spawn of the devil and all. Many horror movie tropes have been built up over the years: Knife-wielding maniacs, cats jumping out at you at just the wrong time and, of course, scary kids. Spooky, terrifying children pop up often in horror movies. In most films, kids are precocious and harmless, which is what makes the juxtaposition of a horror movie kid being scary truly jarring. Here are 20 of the scariest children in horror movie history.