COPENHAGEN, DENMARK - OCTOBER 8: Mary Elizabeth Donaldson (L) and His Royal Highness Crown Prince Frederik of Denmark show their engagement ring to the media during a press conference at Fredensborg Castle October 8, 2003 in Copenhagen, Denmark. The pair announced their engagement, with the wedding set for May 14, 2004. (Photo by Scott Barbour/Getty Images)
(FILES) This file picture dated 03 October 2007 shows Danish Prince Joachim and his fiancee French Marie Cavallier posing in Fredensborg. Denmark's Prince Joachim, fourth in line to the throne, will marry his girlfriend of several years Marie Cavallier on May 24, 2008, the royal palace announced 21 November 2007. AFP PHOTO STEEN BROGAARD (Photo credit should read Steen Brogaard/AFP via Getty Images)
Dutch Crownprince Willem Alexander and Maxima Zorregiueta pose prior to the announcement by Queen Beatrix of the engagement of the crownprince and Argentinian Maxima, at the royal palace Noordeinde in The Hague, 30 March 2001. (Photo by MARCEL ANTONISSE / ANP / AFP) (Photo by MARCEL ANTONISSE/ANP/AFP via Getty Images)
Mette-Marit Tjessem and HRH Crown Prince Haakon Magnus hold hands January 21, 2000 after announcing their engagement in Oslo, Norway. The couple married August 25, 2001. (Photo by Tor Kvello/All Over Press/Getty Images)
STOCKHOLM, SWEDEN - FEBRUARY 24: Crown Princess Victoria of Sweden and Mr. Daniel Westling announced their engagement during a press conference at The Royal Palace on February 24, 2009 in Stockholm, Sweden. The wedding is planned to take place early summer of 2010. (Photo by Patrik Osterberg-Pool/Getty Images)
