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Today is the 20th anniversary of Harry Potter, and, as you've probably noticed everyone is coming out of their cupboard under the stairs to celebrate everything about the franchise.
Back in 1997 the first book, Harry Potter and the Philosopher's Stone, was published, opening up to all of us the magical world in which he lived.
Now, 20 years later when we're all considerably older and (some of us) wiser, that same world is still as thrilling as it was all those years ago.
However, everybody seems to think they're an expert on it. Brandishing their wands about acting like they're part of the fantasy - but how much do you all really know?
Well, have a go of this quiz and find out. A word of warning: Some questions will relate to the whole franchise, so if you're a part time fan who's only seen the films, you're shit out of luck.
Not easy that, is it?
Let us know how you got on in the comments.
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