Prince Philippe Of Belgium And Mathilde D'Udekem Wedding In Brussels, Belgium On December 13, 1999. [Getty Images]

BELGIUM - DECEMBER 13: Prince Philippe of Belgium and Mathilde d'Udekem wedding in Brussels, Belgium on December 13, 1999 - Prince Alexandre and princess Esmeralda, kids of Leopold III and Liliane De Retie. (Photo by Pool BENAINOUS/DEVILLE/DUCLOS/REY/Gamma-Rapho via Getty Images)

Gamma-Rapho Pool BENAINOUS/DEVILLE/DUCLOS/REY