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It's been seven years since the final instalment of the Harry Potter franchise was published, and J.K. Rowling is still finding ways to gets fans excited about her magical world.

Fans of the books and films have also kept themselves entertained with a whole host of theories - but this one might be one of the most convincing of all.

It seems Draco Malfoy could have actually been a werewolf, and it's not as ridiculous as it might seem.

With help from the imaginatively titled website dracomalfoyisawerewolf.com, YouTube user Jonatahn Carlin has compiled all the evidence.

Did Draco have more bite than he let on? Here are the clues:

Fenrir Greyback could have bitten him

It's not a stretch that Voldemort could have ordered Fenrir Greyback to bite Draco as a punishment for his father's actions.

Death Eater Lucius gave Ginny Weasley Tom Riddle's diary, and it could be that the Dark Lord continuing his history of sending the werewolf to punish those who crossed him by biting their children.

No proof of a Dark Mark

Film buffs, sorry - this one is purely from the books, because in those pages there is no confirmation that Draco carries the Dark Mark on his arm.

However, he did frighten Borgin with something on his limb - it's assumed it was the sign of Voldemort's followers, but was it actually a werewolf bite?

Does Voldemort hint at it?

(Image: Studio)

When news that Tonks and Remus are having a baby reaches the Death Eaters, Voldemort tells Draco: "Maybe you can babysit the cubs?"

Obviously, if he was a werewolf it wouldn't have mattered if the offspring had bitten him - did the Dark Lord know something we don't?

Draco isn't treated like a Death Eater

(Image: Warner Bros)

It could be a coincidence, but the Death Eater's invasion of Hogwarts during the Half Blood Prince throws up an interesting clue.

A barrier only passable by bearers of the Dark Mark is set up in the astronomy tower - which it goes up after Draco enters, coming down again just before he leaves.

Hermione is pretty much NEVER wrong

(Image: Warner Brothers)

Although she necessarily doesn't think he's a werewolf, Hermione does NOT believe Draco has the Dark Mark - meaning his secret probably isn't being a Death Eater.

Harry disagrees, but as we know - Chamber of Secrets, anyone? - he's not always right with his Malfoy suspicions.

Draco wouldn't reveal his secret

(Image: Warner Bros)

Although Greyback is proud, werewolves aren't held in high regard in the wizarding world.

For Draco - like Lupin - it would be a shameful secret, one which he would be desperate to keep hidden.