J.K. Rowling Slams Serena Williams Body Shamer in the Best Way Possible

An unexpected celebrity came to the defense of Serena Williams after someone on Twitter attempted to body shame the tennis pro.

While Williams was taking home her sixth Wimbledon win, author J.K. Rowling was gushing over the 33-year-old athlete. "#SerenaSlam! I love her," the Harry Potter writer tweeted on Saturday. "What an athlete, what a role model, what a woman!"

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She also tweeted: "I'm #TeamSerena today, because you don't meet many super-talented people nicer than she is. Go @serenawilliams!"

Responding to Rowling's positive messages about Williams, one Twitter user wrote: "@jk_rowling @hansmollman ironic then that main reason for her success is that she is built like a man."

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Not standing for such body shaming, Rowling wrote back: "@diegtristan8 "she is built like a man". Yeah, my husband looks just like this in a dress. You're an idiot."

Ouch! The 49-year-old author's 4.95 million Twitter followers must have agreed with her because as of Monday morning, her post about Williams had been retweeted 83,000 times.

Rowling isn't the only celebrity fighting back against body shamers. See how Kylie Jenner responded to her critics:

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