The post included a photo showing the Princess of Wales standing in the woods with her arms outstretched. According to the caption, the picture was taken by Prince Louis, Kate's 6-year-old son ...

She also shared a second, close-up photo of frost-covered ferns with ... and Princess Charlotte, 9. "Happy 6th Birthday, Prince Louis! Thank you for all the kind wishes today," she wrote in ...

with a photo taken by Middleton shared on social media. "Happy 6th Birthday, Prince Louis! Thank you for all the kind wishes today," she wrote in the caption. Prince Louis has been an adorable ...