On May 17, 2012, members of the Norwegian Royal Family presided over celebrations on Norway’s National Day. In Oslo, Prince Haakon of Norway, Princess Mette-Marit, and their children, Prince Sverre Magnus and Princess Ingrid Alexandra, along with Princess Mette-Marit’s son, Marius Borg Hoiby, dressed in national costume, greeted children. Prince Haakon, Princess Mette-Marit. King Harald and Queen Sonja also greeted crowds from the balcony of the Royal Palace. Photos by Getty Images.