“Oh, God. We used to argue about everything,” he recalled. “Religion. Politics. I remember one of the big arguments we had on the fourth film - we didn’t speak to each other for a couple of days - was about… She was arguing about the Latin language, that nobody knows what it sounds like, what a Latin accent should be. And I was like, ‘Yeah, but it’s still spoken a lot in the Catholic church.’ Such a wanky argument, looking back, and it got totally out of hand. She was furious; I was livid.

“I certainly would advise anyone, if you’re going to debate with her, know your shit.” - Daniel Radcliffe