OSLO, NORWAY - MAY 10: Prince Nikolaos of Greece and Princess Tatiana of Greece 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)
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Getty Images Entertainment Patrick van Katwijk

OSLO, NORWAY - MAY 10: Prince Nikolaos of Greece and Princess Tatiana of Greece leave to attend a lunch on the Norwegian Royal Yacht "Norge" as part of the celebrations of the 80th Birthdays of King Harald of Norway and Queen Sonja of Norway on May 10, 2017 in Oslo, Norway. (Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker

OSLO, NORWAY - MAY 10: Prince Nikolaos, Greece, Princess Tatiana, Greece attend a lunch on the Royal yacht, Norge, on the occasion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays, on May 10 2017 in Oslo, Norway. (Photo by Nigel Waldron/ Getty Images)OSLO, NORWAY - MAY 10: attends a lunch on the Royal yacht, Norge, on the occasion of the celebration of King Harald and Queen Sonja of Norway 80th birthdays, on May 10 2017 in Oslo, Norway. (Photo by Nigel Waldron/ Getty Images)
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Getty Images Entertainment Nigel Waldron