FREDENSBORG, DENMARK - APRIL 16: (NORWAY OUT) Queen Margarethe II of Denmark waves from the window of Fredensborg Palace during the traditional morning greeting, on her 75th Birthday, on April 16, 2015 in Fredensborg, Denmark.(Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker

FREDENSBORG, DENMARK - APRIL 16: (NORWAY OUT) Queen Margarethe II of Denmark waves from the window of Fredensborg Palace during the traditional morning greeting, on her 75th Birthday, on April 16, 2015 in Fredensborg, Denmark.(Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker

FREDENSBORG, DENMARK - APRIL 16: (NORWAY OUT) Crown Prince Frederik of Denmark, Crown Princess Mary of Denmark, with, Princess Josephine, and Prince Vincent, attend The traditional morning greeting at Fredensborg Palace, for Queen Margarethe II of Denmark on her 75th Birthday, on April 16, 2015 in Fredensborg, Denmark.(Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker

FREDENSBORG, DENMARK - APRIL 16: (NORWAY OUT) ( L to R ) King Harald of Norway, King Carl Gustaf of Sweden, Henri Grand Duke of Luxembourg, King Willem Alexander of the Netherlands, Queen Maxima of the Netherlands, attend The traditional morning greeting at Fredensborg Palace, for Queen Margarethe II of Denmark on her 75th Birthday, on April 16, 2015 in Fredensborg, Denmark.(Photo by Julian Parker/UK Press via Getty Images)
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UK Press Julian Parker