Holly Willoughby has shared a rare photo of all three of her children together as they set up a Harry Potter-inspired photoshoot in their garden.The This Morning presenter, who is a mother to Harry, 11, Belle, nine, and Chester, six, with husband Dan Baldwin took to Instagram to share the adorable photo as the kids dressed up. In the snap, the children are wearing clothes from Marks & Spencer, which Holly is the face of, as they played around with witches hats and brooms.