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BRUSSEL, BELGIUM - JULY 21: King Philippe of Belgium and Queen Mathilde of Belgium with their children (from L) Princess Eleonore, Prince Gabriel, Crown Princess Elisabeth and Prince Emmanuel, during the military parade on the Belgian National Day on July 21, 2015 in Brussel, Belgium. (Photo by Patrick Aventurier/Getty Images)

BRUSSEL, BELGIUM - JULY 21: King Philippe of Belgium and Queen Mathilde of Belgium with their children (from L) Princess Eleonore, Prince Gabriel, Crown Princess Elisabeth and Prince Emmanuel, during the military parade on the Belgian National Day on July 21, 2015 in Brussel, Belgium. (Photo by Patrick Aventurier/Getty Images)