COPENHAGEN, DENMARK - MAY 26: Crown Prince Haakon of Norway and Crown Princess Mette-Marit of Norway during the gala banquet on the occasion of The Crown Prince's 50th birthday at Christiansborg Palace Chapel on May 26, 2018 in Copenhagen, Denmark. (Photo by Patrick van Katwijk/Getty Images)
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Getty Images Entertainment Patrick van Katwijk

COPENHAGEN, DENMARK - MAY 26: Crown Prince Haakon of Norway and Crown Princess Mette-Marit of Norway during the gala banquet on the occasion of The Crown Prince's 50th birthday at Christiansborg Palace Chapel on May 26, 2018 in Copenhagen, Denmark. (Photo by Patrick van Katwijk/Getty Images)
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Getty Images Entertainment Patrick van Katwijk

COPENHAGEN, DENMARK - MAY 26: Crown Prince Haakon of Norway and Crown Princess Mette-Marit of Norway during the gala banquet on the occasion of The Crown Prince's 50th birthday at Christiansborg Palace Chapel on May 26, 2018 in Copenhagen, Denmark. (Photo by Patrick van Katwijk/Getty Images)
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Getty Images Entertainment Patrick van Katwijk

COPENHAGEN, DENMARK - MAY 26: Crown prince Haakon of Norway and wife Crown Princess Mette-Marit are lead to their table at The Knights hall where Queen Margrethe of Denmark host the Galla Dinner for Crown Prince Frederik on the occasion of his 50th birthday at Christiansborg Palacel on May 26, 2018 in Copenhagen, Denmark. Some 350 guest participated in the event. (Photo by Ole Jensen/Getty Images)
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Getty Images Entertainment Ole Jensen