OSLO, NORWAY - MAY 10: Crown Prince Haakon and Crown Princess Mette-Marit of Norway arrive at the Opera House on the ocassion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays on May 10, 2017 in Oslo, Norway. (Photo by Patrick van Katwijk/Getty Images)
OSLO, NORWAY - MAY 10: Crown Princess Mette-Marit of Norway arrives at the Opera House on the ocassion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays on May 10, 2017 in Oslo, Norway. (Photo by Patrick van Katwijk/Getty Images)
