This is J.K. Rowling.
She's the author of a popular series of children's books. You might have heard of them.
(Though they're kinda obscure.)
A few years ago, she caused a bit of a stir when she revealed that she'd always thought of Dumbledore, one of her most popular characters, as gay.
(Shhhhh! Don't wake him up. He's a powerful wizard!)
Of course, being gay is just one part of who Dumbledore is, like being a wizard or having long hair or [REDACTED SPOILER OMG]. So Rowling never really felt the need to make a big deal out of it in the books. But since Dumbledore is not identified as gay in the text, lots of people were ... confused.
So when a fan tweeted this at Rowling:
"Thank you so much for writing Harry Potter. I wonder why you said that Dumbledore is gay, because I can't see him in that way."
She decided to respond. And it was, in a word...
UPDATE - 3/25/15 - 1:45pm: After Rowling tweeted her response, the fan wrote back, in a tweet since deleted:
@jk_rowling amazing answer... Yes you are absolutely right. Such an inspiration!!!
UPDATE - 3/25/15 - 4:40pm: And J.K. Rowling herself weighed in to answer those who thought the fan was out of line with her original tweet.