How it all began:
It was a TV Spot that changed everything. I think it was the TV spot below in fact, because I vaguely remember laughing at Ron's response to Professor McGonagall transforming into a cat, and this was the only spot I found with that scene in it.
My brother and I turned on the TV on a November night after working on what seemed like countless hours of homework. My dad just happened to walk in as soon as the spot started running, and watching it together, all three of us got amused with the various complications the characters were getting into in it (someone blew up a feather!). My dad especially liked the graphics in the McGonagall transforming part, so as soon as the spot ended, he immediately asked us if we wanted to see it. We answered with a yes, as eagerly as a 7 year old and a little 5 year old could.
So off to the movie theater we went a couple days later and I walked out of the matinee show blown away. Three best friends! Harry! Ron! Hermione! Magic! A mysterious school! Weird teachers! Hagrid! Dragons! Evil villain! It was my first foray into a fantasy world and I was delighted in every bit of it.
Then I got the real book for Christmas, which changed everything once again. JK Rowling became my author hero and the world of Hogwarts and the magic became real. (....And Dan, Emma, and Rupert became my favorite actors in the whole entire universe for portraying my literary heroes onscreen.)
It's strange to think it's been a decade from that point, but it has been a wonderful decade. :)
If you're a Harry Potter fan, how did you first get started on the series? Or...if you're not much of HP fan, where did you first hear about it? :D