Dutch King Willem-Alexander, his wife Queen Maxima and their daughters Princess Amalia (R), Princess Alexia (L) and Princess Ariane (C) wave to the crowds during their visit to Zwolle, to mark King's Day (Koningsdag), celebrating the King's birthday. / AFP / ANP / Remko de Waal / Netherlands OUT (Photo credit should read REMKO DE WAAL/AFP/Getty Images)
