Prince William and Kate Middleton are in final preparation mode for their wedding tomorrow in London! Information from their ceremony's program was released just this morning, containing William and Kate's special thank-you message for the outpouring of love they've received before the vow exchange. In addition, Kate and William unveiled this new black and white photograph shot by Mario Testino! Mario, who was a close friend of the prince's mother, Diana, also was behind the lens for William and Kate's first engagement photos. William and Kate have planned to incorporate Diana's life and legacy into the service, especially though their choice of music. We can't wait for everything to begin tomorrow morning. Make sure to stay tuned to PopSugar for our royal wedding live stream.