Prinsesse Mabel av Oranien-Nassau 50 år

Princess Mabel van Oranje at AFAS Live in Amsterdam, on June 16, 2018, to attend the Amsterdam Diner, the annual fundraising dinne... Credit: DPA

Princess Mabel of Oranje arrives at the Faculty of Science and Engineering of the University of Groningen, on March 21, 2018, to a... Credit: DPA

Princess Mabel van Oranje leaving at the Grote Kerk in Vlaardingen, on March 13, 2018, after receiving the Geuzenpenning for her o... Credit: DPA

Princess Mabel, Guests are leaving the royal palace the day after the private reception for the 80th birthday of Princess Beatrix,... Credit: danapress

Oslo 20170509. Prinsesse Mabel (t.v.) og prinsesse Astrid, fru Ferner. Kongeparet mottar gratulasjonsdeputasjoner i anledning si... Credit: NTB

Princess Mabel, Amsterdam, 15-12-2016 King Willem-Alexander and Queen Maxima , Princess Beatrix, Princess Mabel and Princess ... Credit: danapress

Princess Mabel, attend The Prince Claus Prize ceremony at the Royal Palace of Amsterdam. Amsterdam, Netherlands 2. December 2015 ... Credit: danapress

Dutch Princess Mabel poses for photographers during a photo session in the Austrian skiing resort of Lech, on Monday, Feb. 17, 201... Credit: AP

Princess Mabel of The Netherlands attends the wedding of Prince Jaime de Bourbon de Parme and Victoria Cservenyak at the Onze Liev... Credit: DPA

2005-04-24 (ARCHIVE) 24APR, 2005 – The fourth grandchild of Queen Beatrix. Princess Mabel gave birth to her baby girl on 26th of M... Credit: ANP

Denmark's Crown Princess Mary (R) chats to the Netherlands' Princess Mabel (L) of Orange-Nassau during the Woman Deliver Conferenc... Credit: AFP

Princess Mabel of The Netherlands leaving the Royal Palace Amsterdam for the dinner at the Rijksmuseum hosted by Queen Beatrix of ... Credit: DPA

(FILES) This file photo taken on May 27, 2011 shows Dutch Princess Mabel and Prince Friso arriving at the concert building in Amst... Credit: AFP

FILE - In this April 24, 2004 file photo, Netherlands' Prince Johan Friso, the second son of Queen Beatrix, right, and Mabel Wisse... Credit: AP

In this Feb. 19, 2011 file photo Netherland's Prince Friso, left, and his wife Princess Mabel, right, pose with their daughters L... Credit: AP

STOCKHOLM, SVERIGE 20100619. Prins Johan Friso av Nederland og hans kone Mabel på vei inn til Storkyrkan før vielsen mellom kronp... Credit: NTB

Princess Mabel of the Netherlands attends the Amsterdam Dinner 2010 hosted by the Aids Foundation at Heineken Music Hall in Amster... Credit: DPA

Princess Mabel, Zaria Christening of Princess Ariane at the Den Haag Abbey Den Haag, Netherlands - 20.10.07 **Available for pub... Credit: wenn.com

Prince Friso and Princess Mabel with their daughters Luana and Zairia arrive at the baptism of Leonore, daughter of Prince Constan... Credit: DPA

Picture taken 24 April 2004 at Noordeinde Palace in The Hague shows a family photo of Prince Johan Friso and Mabel Wisse Smit afte... Credit: AFP