HARRY Potter author JK Rowling appears to cast a spell: Abracada-BRA!
The writer, 42, showed a little too much cleavage during a US book tour in front of giggling school kids. She needed more than a magic wand to cover her blushes after a journalist pointed out her dress had slipped down, revealing her underwear.
She gasped: “Oh gosh! Thank you for that.
"You can have any questions you like answered now.”
JK was launching her Open Book Tour at Hollywood.