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JK Rowling serves up perfect rebuke

Best Twitter comeback of the last week goes to JK Rowling, who stuck up for Serena Williams when she was body shamed by some troll who said her Wimbledon victory was down to the fact that she was "built like a man".

Rowling posted a picture of Williams in a knock-out, bright-red bodycon dress (left) that emphasised her curves. "Yeah, my husband looks just like this in a dress. You're an idiot," tweeted Rowling.

It's not the first time she's been a Twitter heroine. When someone suggested LGBT students weren't in Hogwarts she tweeted "if Harry Potter taught us anything, it's that no one should live in a closet".