(L-R) Crown Princess Mary, Crown Prince Frederik, King Philippe, Queen Margrethe, Queen Mathilde, Prince Joachim and Princess Marie pose for a photo at the state banquet on March 28, 2017 at Christiansborg Castle in Copenhagen. The Belgian Royal Couple is on a two-day state visit to Denmark. / AFP PHOTO / Scanpix Denmark / Keld Navntoft / Denmark OUT (Photo credit should read KELD NAVNTOFT/AFP/Getty Images)

(L-R) Crown Princess Mary, Crown Prince Frederik, King Philippe, Queen Margrethe, Queen Mathilde, Prince Joachim and Princess Marie pose for a photo at the state banquet on March 28, 2017 at Christiansborg Castle in Copenhagen.
The Belgian Royal Couple is on a two-day state visit to Denmark. / AFP PHOTO / Scanpix Denmark / Keld Navntoft / Denmark OUT        (Photo credit should read KELD NAVNTOFT/AFP/Getty Images)

Belgian King Philippe (L) and his wife Queen Mathilde welcome the Danish Crown Prince Frederik (R) and his wife Crown Princess Mary upon their arrival to the reciprocal event at The Black Diamond in Copenhagen March 29, 2017. / AFP PHOTO / Scanpix Denmark AND Scanpix / Henning Bagger / Denmark OUT (Photo credit should read HENNING BAGGER/AFP/Getty Images)

Belgian King Philippe (L) and his wife Queen Mathilde welcome the Danish Crown Prince Frederik (R) and his wife Crown Princess Mary upon their arrival to the reciprocal event at The Black Diamond in Copenhagen March 29, 2017. / AFP PHOTO / Scanpix Denmark AND Scanpix / Henning Bagger / Denmark OUT        (Photo credit should read HENNING BAGGER/AFP/Getty Images)