Harry Potter's scar is quite possibly the most famous one on earth. But what if it wasn't really a lightning bolt at all?
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Yep, this is the latest Harry Potter fan theory doing the rounds online - and it's got people seriously shook. One fan took to Twitter to point out that Harry's scar is actually shaped like the wand movement that is used for the Avada Kedavra killing curse. In the books, this is the curse that Voldemort used to try and kill Harry when he was a baby, which rebounded, leaving Harry with his famous scar.
It didn't take long for the tweet in question to go viral - with fans losing their minds over the fact that they'd missed this detail.
Check out the video above to see what J.K. Rowling herself had to say about Harry's famous scar...