King Willem Alexander, Queen Maxima and their daughters Amalia (L), Ariane (C) and Alexia (R) pose in Tilburg, on April 27 2017, as they celebrate the King's day, marking the birth of King Willem-Alexander. In the Netherlands, King Willem-Alexander's 50th birthday is celebrated during the traditional Kingsday. / AFP PHOTO / ANP / Remko de Waal / Netherlands OUT (Photo credit should read REMKO DE WAAL/AFP/Getty Images)
