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(Original Caption) A tender moment on the balcony of the Brussels Town Hall. (Photo by THIERRY ORBAN/Sygma via Getty Images)

(Original Caption) A tender moment on the balcony of the Brussels Town Hall. (Photo by THIERRY ORBAN/Sygma via Getty Images)

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402950 01: Dutch Prince Willem Alexander (R) and Princess Maxima (2nd R) are greeted by Belgium's Prince Philip and Princess Matilde (L) upon their arrival at Gosselies Airport before they attend the Belgian-Dutch Conference March 28, 2002 in Charleroi, Belgium. The Neighbors on the Electronic Highway conference will address the development of information and communication technology (ICT) in the Netherlands and Belgium. (Photo by Michel Porro/Getty Images)

402950 01: Dutch Prince Willem Alexander (R) and Princess Maxima (2nd R) are greeted by Belgium's Prince Philip and Princess Matilde (L) upon their arrival at Gosselies Airport before they attend the Belgian-Dutch Conference March 28, 2002 in Charleroi, Belgium. The Neighbors on the Electronic Highway conference will address the development of information and communication technology (ICT) in the Netherlands and Belgium. (Photo by Michel Porro/Getty Images)

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BRUSSELS, BELGIUM - JULY 21: Princess Mathilde (L) has a chat with Queen Fabiola (R) during the military parade, part of National Day celebrations July 21, 2003 in Brussels, Belgium. Every July 21 the Belgians celebrate their National Day with a military parade in front of the Royal Palace with the Royal family in attendance. (Photo By Mark Renders/Getty Images)

BRUSSELS, BELGIUM - JULY 21:  Princess Mathilde (L) has a chat with Queen Fabiola (R) during the military parade, part of National Day celebrations July 21, 2003 in Brussels, Belgium. Every July 21 the Belgians celebrate their National Day with a military parade in front of the Royal Palace with the Royal family in attendance. (Photo By Mark Renders/Getty Images)

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AGADEZ, NIGER: Princess Mathilde of Belgium receives a camel seat as gift in the desert near Agadez in Niger 19 February 2004. Princess Mathilde and Minister for Cooperation Development Marc Verwilghen are on a five-day visit to Niger. AFP PHOTO BELGA/ETIENNE ANSOTTE (Photo credit should read ETIENNE ANSOTTE/AFP via Getty Images)

AGADEZ, NIGER:  Princess Mathilde of Belgium receives a camel seat as gift in the desert near Agadez in Niger 19 February 2004. Princess Mathilde and Minister for Cooperation Development Marc Verwilghen are on a five-day visit to Niger. AFP PHOTO    BELGA/ETIENNE ANSOTTE  (Photo credit should read ETIENNE ANSOTTE/AFP via Getty Images)

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BRUSSELS, BELGIUM - FEBRUARY 1: Princess Mathilde attends a gala dinner for the President of the Hellenic Republic, Constantinos Stephanopoulos, at the Royal Castle on February 1, 2005 in Laeken, Belgium. Stephanopoulos is on an official visit to Belgium. (Photo by Mark Renders/Getty Images)

BRUSSELS, BELGIUM - FEBRUARY 1: Princess Mathilde attends a gala dinner for the President of the Hellenic Republic, Constantinos Stephanopoulos, at the Royal Castle on February 1, 2005 in Laeken, Belgium.  Stephanopoulos is on an official visit to Belgium. (Photo by Mark Renders/Getty Images)