Simon Cowell has hired Dawn French for his upcoming show Walk The Line.The TV star has enlisted the help of Dawn to sit on the judging panel next to music icons including Gary Barlow and Craig David, amongst others.The Vicar of Dibley star, 64, is reported to have come as a surprise given the show focuses on finding singing talent.Those competing are set to battle it out for a chance to win a whopping £500,000.