THE HAGUE, NETHERLANDS - APRIL 29: Grand Duchess MariaTeresa and Hereditary Grand Duhcess Stephanie of Luxembourg for an private birthday party for King Willem-Alexander in the Royal Stables on April 29, 2017 in The Hague, Netherlands. (Photo by Patrick van Katwijk/Getty Images)
THE HAGUE, NETHERLANDS - APRIL 29: A coach with Royal guests with Prince Constantijn of The Netherlands, Grand Duke Henri of Luxembourg and Crown Princess Victoria of Sweden arrive at Palace Noordeinde for an private birthday party for King Willem-Alexander in the Royal Stables on April 29, 2017 in The Hague, Netherlands. (Photo by Patrick van Katwijk/Getty Images)
