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(L-R) Leah Isadora Behn, Princess Ingrid Alexandra, Prince Sverre Magnus, Maud Angelica Behn, Queen Sonja, Emma Tallulah Behn, King Harald, Crown Princess Mette-Marit, Crown Prince Haakon and Martha greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen. Photo: Jon Olav Nesvold/ NTB scanpix / AFP PHOTO / NTB scanpix AND NTB Scanpix / Haakon Mosvold Larsen / Norway OUT (Photo credit should read HAAKON MOSVOLD LARSEN/AFP/Getty Images)

(L-R) Leah Isadora Behn, Princess Ingrid Alexandra, Prince Sverre Magnus, Maud Angelica Behn, Queen Sonja, Emma Tallulah Behn, King Harald, Crown Princess Mette-Marit, Crown Prince Haakon and Martha greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen. Photo: Jon Olav Nesvold/ NTB scanpix / AFP PHOTO / NTB scanpix AND NTB Scanpix / Haakon Mosvold Larsen / Norway OUT (Photo credit should read HAAKON MOSVOLD LARSEN/AFP/Getty Images)
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AFP HAAKON MOSVOLD LARSEN

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(L-R) Eliza Reid, Iceland's President Gudni Johannesson, Grand Duchess Maria Teresa of Luxembourg, Prince Albert II of Monaco, Grand Duke Henri of Luxembourg, Queen Mathilde of Belgium and King Philippe of Belgium greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen of Norway. Photo: Jon Olav Nesvold/ NTB scanpix / AFP PHOTO / NTB Scanpix / Jon Olav Nesvold / Norway OUT (Photo credit should read JON OLAV NESVOLD/AFP/Getty Images)

(L-R) Eliza Reid, Iceland's President Gudni Johannesson, Grand Duchess Maria Teresa of Luxembourg, Prince Albert II of Monaco, Grand Duke Henri of Luxembourg, Queen Mathilde of Belgium and King Philippe of Belgium greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen of Norway. Photo: Jon Olav Nesvold/ NTB scanpix / AFP PHOTO / NTB Scanpix / Jon Olav Nesvold / Norway OUT (Photo credit should read JON OLAV NESVOLD/AFP/Getty Images)
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AFP JON OLAV NESVOLD

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(L-R) Jenni Haukio, Desiree Kogevinas, Carlos Eugster, Crown Princess Victoria and prince Daniel of Sweden greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen. / AFP PHOTO / NTB Scanpix / Jon Olav Nesvold / Norway OUT (Photo credit should read JON OLAV NESVOLD/AFP/Getty Images)

(L-R) Jenni Haukio, Desiree Kogevinas, Carlos Eugster, Crown Princess Victoria and prince Daniel of Sweden greet wellwishers from the balcony of the Royal Palace in Oslo, Norway on May 9, 2017 to mark the 80th Birthday of the King and Queen. / AFP PHOTO / NTB Scanpix / Jon Olav Nesvold / Norway OUT (Photo credit should read JON OLAV NESVOLD/AFP/Getty Images)
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AFP JON OLAV NESVOLD

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OSLO, NORWAY - MAY 09: ( L to R ) Leah Isadora Behn, Princess Ingrid Alexandra, Prince Sverre Magnus, Maud Angelica Behn, 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)

OSLO, NORWAY - MAY 09: ( L to R ) Leah Isadora Behn, Princess Ingrid Alexandra, Prince Sverre Magnus, Maud Angelica Behn, 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

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OSLO, NORWAY - MAY 09: Crown Princess Victoria, and Prince Daniel of Sweden, 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)

OSLO, NORWAY - MAY 09: Crown Princess Victoria, and Prince Daniel of Sweden, 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