Unless you've been living in a wholly magic-free world for the last two decades, you'll know that today is a very important day: the 20th anniversary of the publication of Harry Potter and the Philosopher's Stone.
All morning, fans of the series have been sharing their stories of how Harry Potter changed their lives on Twitter using the hashtag #HarryPotter20.
As well as sharing poignant quotes to celebrate the anniversary.
But, of course, the one thing everyone was waiting for was a message from the woman who started it all, J.K. Rowling.
And her words will make you seriously emotional.
I think I speak for everyone when I say: thank you, Jo.