While some may believe the picture was taken by a professional, it appears it was in fact taken by Kate’s youngest son Prince Louis, six, as they enjoyed a walk together. It is the first photograph taken by Louis to ever be publicly published.

“Don’t forget to nurture all that which lies beyond the disease,” Kate, 43, captioned an Instagram post on Monday, February 3. The Princess of Wales is standing on top of a tree stump with her arms outstretched in the image. She was bundled up in a jacket, scarf and hat during winter in the U.K.