OSLO, NORWAY - MAY 10: King Philippe of Belgium, Queen Mathilde of Belgium, Princess Mabel of Orange-Nassau,  Princess Beatrix of the Netherlands, Queen Maxima of the Netherlands and King Willem-Alexander of the Netherlands attend a lunch on the Norwegian Royal yatch 'Norge'to celebrate the 80th birthdays of King Harald of Norway and Queen Sonja of Norway on May 10, 2017 in Oslo, Norway. (Photo by Patrick van Katwijk/Getty Images)