William, the future King, shared a striking new photo of his wife in honour of her birthday - and, according to an expert, the black and white image sends out a strong message

Prince William lovingly paid tribute to the Princess of Wales's 'remarkable' strength as he shared a touching birthday post

Happy birthday Princess Kate! And happy new-royal-portrait-day to the rest of us. In honor of Kate Middleton's 43rd birthday on January 9, Prince William shared a new, black-and-white portrait of the Princess of Wales on the couple's official Instagram, with a sweet message in the caption.