Harry Potter creator J.K. Rowling celebrated tennis player Serena Williams' sixth Wimbledon title by annihilating a sexist Twitter troll.
After Rowling posted a congratulatory tweet following Williams' historic win, Twitter user @diegtristan8 responded by mockingly attributing the tennis player's success to her being "built like a man."
Rowling had a fantastic response, telling the troll off for his body-shaming behavior.
As it turns out, Rowling is a bit of a Williams superfan — info that might have stayed this particular troll's hand. Earlier in the day, she even tweeted out this photo:
As for Williams, she doesn't need to prove her authenticity to the haters. She now has a stunning 21 major women's and mixed tennis titles to prove it.