J.K. Rowling’s legend status cranked up a notch over the weekend, as she schooled a Twitter “idiot”, who dared to body-shame Wimbledon queen Serena Williams.

The Harry Potter author was live tweeting her tennis viewing, when user @diegtristan8 commented on Serena’s shape, writing, “ironic then that main reason for her success is that she is built like a man.”

Rowling fought Serena’s corner with two photos of the tennis ace looking fierce, and the remark, “Yeah, my husband looks just like this in a dress. You're an idiot.”

While @diegtristan8 has continued his trolling over the weekend, J.K. appears to have blocked him, while Serena has not commented on the incident.

The 33-year-old stunned at Sunday night’s Wimbledon Champions Dinner, rocking a pale pink floor-length gown, embellished with silver crystals.

That’s how to shut a hater down without saying a word.