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AMSTERDAM, NETHERLANDS - NOVEMBER 28: (first row L-R) Queen Mathilde and King Philippe of Belgium, King Willem-Alexander, Queen Maxima and Princess Beatrix of The Netherlands (second row L-R) Pieter van Vollenhoven, Princess Margriet, Prince Constantijn and Princess Laurentien at the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - NOVEMBER 28: (first row L-R) Queen Mathilde and King Philippe of Belgium, King Willem-Alexander, Queen Maxima and Princess Beatrix of The Netherlands (second row L-R) Pieter van Vollenhoven, Princess Margriet, Prince Constantijn and Princess Laurentien at the official photo ahead the state banquet for the Belgian King and Queen
on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - NOVEMBER 28: Queen Maxima of The Netherlands during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - NOVEMBER 28: Queen Maxima of The Netherlands during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - NOVEMBER 28: Queen Mathilde of Belgium during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - NOVEMBER 28: Queen Mathilde of Belgium during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - NOVEMBER 28: Princess Margriet and her husband Pieter van Vollenhoven of The Netherlands leave the royal palace after the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - NOVEMBER 28: Princess Margriet and her husband Pieter van Vollenhoven of The Netherlands leave the royal palace after the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

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AMSTERDAM, NETHERLANDS - NOVEMBER 28: Princess Laurentien of The Netherlands during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)

AMSTERDAM, NETHERLANDS - NOVEMBER 28: Princess Laurentien of The Netherlands during the official photo ahead the state banquet for the Belgian King and Queen on November 28, 2016 in Amsterdam, Netherlands. (Photo by Patrick van Katwijk/Getty Images)