While the cast of "Harry Potter" maintains a near-perfect facade, there are instances of drama and plenty of secrets that happened behind the scenes.

Helena Bonham Carter both accidentally injured Mathew Lewis and had a feud with co-star Emma Thompson.

While filming, Alan Rickman had a BMW he would not let anyone touch.

Harry Potter was almost green-eyed and Hermione was almost buck-toothed—the cast was also almost all American.

The Harry Potter movies were being filmed for over ten years, and during that time, we were treated to tons of behind the scenes footage of our favorite cast members messing around and generally being adorable on set. From what we saw, everyone on set, cast and crew alike, got along.

That said, ever since the last movie was released, a number of fascinating stories have surfaced about some of the antics that went on off camera. Since this is a near-perfect and closely-knit cast, most of the drama was on the light side, but there were some moments that teetered on the edge of disaster.

While the movies came out years ago, the Harry Potter fandom is the gift that keeps on giving with the opening of several Wizarding World theme parks and the release of The Cursed Child over a year ago, as well as the Fantastic Beasts movies.

Since the Harry Potter fandom is still alive and well, those involved with the production of the Harry Potter films always have new behind-the-scenes tidbits to share with the fans– and we’re here to eat it all up – the good and the bad.

With that said, here are the 15 Secrets You Didn’t Know Behind The Making Of "Harry Potter."