20/07/2011 08:08 BST | Updated 19/09/2011 06:12 BST

JK Rowling And Rihanna Wear The Same Oscar De La Renta Dress

When we first saw JK Rowling walk the Harry Potter red carpet in an Oscar de la Renta gown, her dress looked a little bit familiar. That's because Rihanna also wore the dress to collect her Brit Award earlier this year.