Princess Adrienne of Sweden turned 4 today. Princess Madeleine shared two new photos of Princess Adrienne on the occasion of her 4th birthday. Princess Madeleine captioned the photos: "Happy 4th Birthday to our sweet Adrienne! You’re our youngest, yet you stand strong on your own two feet. And you are smart, caring and full of life. Leonore, Nicolas, Mummy and Daddy all love you very much!"