J.K. Rowling has pretty much been the undisputed queen of Twitter since she joined six years ago. She's an active user, posting Potter trivia & news on the reg, and frequently uses the platform to talk directly with her fans.

So when a supposed Potterhead had a dumb response to Rowling tweeting support of Wimbledon champ & superhuman Serena Williams...

...J.K. laid the smackdown on thick.


Check out more of Rowling's Twitter takedowns, and just plain awesome tweets, in the slides below: