COPENHAGEN, DENMARK - MAY 26: Queen Margrethe of Denmark leads the cheering for Crown Prince Frederik of Denmark /L- 3rd) on the Amalienborg Palace square on the occasion of his 50th birthday on May 26, 2018 in Copenhagen, Denmark. many thousand of Danes and tourists where oin the Palads Square to share this moment. Later during the evening the Crown Prince host a Gala Banquet at Christiansborg (Photo by Ole Jensen/Getty Images)
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Getty Images Entertainment Ole Jensen

COPENHAGEN, DENMARK - MAY 26: Crown Princess Mary of Denmark, Crown Prince Frederik of Denmark, Queen Margrethe of Denmark, Princess Isabella of Denmark, Prince Vincent of Denmark, Princess Josephine of Denmark and Prince Christian of Denmark when the Royal Life Guards carry out the changing of the guard on Amalienborg Palace square on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark 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 Princess Mary of Denmark, Crown Prince Frederik of Denmark, Queen Margrethe of Denmark, Princess Isabella of Denmark, Prince Vincent of Denmark, Princess Josephine of Denmark and Prince Christian of Denmark when the Royal Life Guards carry out the changing of the guard on Amalienborg Palace square on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark 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 Princess Mary of Denmark, Crown Prince Frederik of Denmark, Queen Margrethe of Denmark, Princess Isabella of Denmark, Prince Vincent of Denmark, Princess Josephine of Denmark and Prince Christian of Denmark when the Royal Life Guards carry out the changing of the guard on Amalienborg Palace square on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark 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 Princess Mary of Denmark, Crown Prince Frederik of Denmark, Queen Margrethe of Denmark, Princess Isabella of Denmark, Prince Vincent of Denmark, Princess Josephine of Denmark and Prince Christian of Denmark when the Royal Life Guards carry out the changing of the guard on Amalienborg Palace square on the occasion of the 50th birthday of The Crown Prince Frederik of Denmark on May 26, 2018 in Copenhagen, Denmark. (Photo by Patrick van Katwijk/Getty Images)
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Getty Images Entertainment Patrick van Katwijk