Prince William and Kate Middleton marked their 15th wedding anniversary on Wednesday with a new family photo .

“Celebrating 15 years of marriage ❤️,” the Prince and Princess of Wales wrote via Instagram alongside a sweet snap with their children: Prince George, 12, Princess Charlotte, 10, and Prince Louis, 8.

In the outdoor shot, William, 43, relaxed on the grass in a polo and shorts, two dogs on one side of him and his eldest child on the other.

Prince William and Kate Middleton marked their 15th wedding anniversary on Wednesday. X / @KensingtonRoyal

“Celebrating 15 years of marriage,” the Prince and Princess of Wales (pictured above at their April 2011 nuptials) wrote via Instagram.…