Alan Rickman intimidating even off-screen, Rupert Grint’s real arachnophobia, and candles falling from the sky... these behind-the-scenes facts from the Harry Potter set will blow your wizarding mind.

Did you know Filch hates students because he can't do magic? Or that Ron fears spiders thanks to Fred? These and 6 more surprising book-vs-movie differences will blow your mind.

Harry Potter was much more than the Boy Who Lived. He was a human Horcrux, an unwitting vessel of the darkest magic. This theory changes everything.