OSLO, NORWAY - MAY 09: Crown Prince Frederik and Crown Princess Mary of Denmark attend an official Gala dinner at the Royal Palace, in Oslo, as part of The Celebrations of the 80th Birthdays of King Harald and Queen Sonja of Norway. on May 9, 2017 in Oslo, Norway. (Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker

OSLO, NORWAY - MAY 09: Crown Prince Frederik and Crown Princess Mary of Denmark attend the official Gala dinner at the Royal Palace on May 9, 2017 in Oslo, Norway. King Harald and Queen Sonja of Norway are celebrating their 80th birthdays. (Photo by Patrick van Katwijk/Getty Images)
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Getty Images Entertainment Patrick van Katwijk

OSLO, NORWAY - MAY 09: Crown Prince Frederik and Crown Princess Mary of Denmark, Prince Nikolaos and Princess Tatiana of Greece, and Queen Margrethe of Denmark and Queen Anne Marie of Greece, attend an official Gala dinner at the Royal Palace, in Oslo, as part of The Celebrations of the 80th Birthdays of King Harald and Queen Sonja of Norway. on May 9, 2017 in Oslo, Norway. (Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker