J.K. Rowling — DESTROYS SERENA WILLIAMS HATER … She’s Beautiful, You Moron! | TMZ.com

J.K. Rowling just went all AVADA KEDAVRA on some pathetic cyber troll — EVISCERATING an “idiot” who talked smack about Serena Williams.  The “Harry…

Source: J.K. Rowling — DESTROYS SERENA WILLIAMS HATER … She’s Beautiful, You Moron! | TMZ.com