VIDEO : Christopher Nolan Compares Harry Styles Casting To Heath Ledger's Joker

It's been years since Christopher Nolan walked into the world of Batman, but the director hasn't been bored. Reviews for Nolan's new movie Dunkirk are coming in hot as they praise both the director and singer-slash-actor Harry Styles. However, some DC fans are a bit boggled to hear Nolan compare the One Direction star's casting ...