Announcement Of The Engagement Of Denmark's Future King, Crown Prince Frederik And Mary Elizabeth Donaldson At The Christian Ix Palace, Amalienborg Castle In Fredensborg, Denmark On October 08, 2003 [Getty Images]

DENMARK - OCTOBER 08: Mary Elizabeth Donaldson And Crown Prince Frederik Just Before They Appeared on The Balcony To Wave The Crowd in Fredensborg, Denmark on October 08, 2003 (Photo by Eric TRAVERS/Gamma-Rapho via Getty Images)

DENMARK - OCTOBER 08: Mary Elizabeth Donaldson And Crown Prince Frederik Just Before They Appeared on The Balcony To Wave The Crowd in Fredensborg, Denmark on October 08, 2003 (Photo by Eric TRAVERS/Gamma-Rapho via Getty Images)

DENMARK - OCTOBER 08: Queen Margrethe Cleaning The Jacket Of Her Son, Crown Prince Frederik And Mary Elizabeth Donaldson in Fredensborg, Denmark on October 08, 2003 (Photo by Eric TRAVERS/Gamma-Rapho via Getty Images)

DENMARK - OCTOBER 08: Queen Margrethe, Crown Prince Frederik, Mary Elizabeth Donaldson And Prince Henrik in Fredensborg, Denmark on October 08, 2003 (Photo by Eric TRAVERS/Gamma-Rapho via Getty Images)

DENMARK - OCTOBER 08: Thousands Of People Waving Danish And Australian Flags Mary Elizabeth Donaldson Appeared At The Balcony in Fredensborg, Denmark on October 08, 2003 (Photo by Eric TRAVERS/Gamma-Rapho via Getty Images)