Stephen King is famous for writing novels that have redefined the horror genre, from Carrie to The Shining and dozens more, but he's also widely known as a devoted cinephile. The horror novelist loves movies of all kinds, and he's quick to tweet his latest musings about current films, like Weapons. On Monday, September 8, he did something he's never done before - he revealed his 10 favorite movies of all time via X. His post went viral and became a source of good-natured debate.