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DENMARK - OCTOBER 14: Princess Margrethe, later Queen Margrethe II, weds Prince Henrik in Copenhagen. Prince Henrik was formerly French diplomat Count Henri de Monpezat. (Photo by SSPL/Getty Images)

DENMARK - OCTOBER 14:  Princess Margrethe, later Queen Margrethe II, weds Prince Henrik in Copenhagen. Prince Henrik was formerly French diplomat Count Henri de Monpezat.  (Photo by SSPL/Getty Images)

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The wedding of Princess Margrethe (later Margrethe II of Denmark) to French diplomat Henri de Laborde de Monpezat in Copenhagen, 10th June 1967. With them on the balcony are the bride's parents, King Frederick IX (right) and Queen Ingrid. (Photo by David Cairns/Express/Getty Images)

The wedding of Princess Margrethe (later Margrethe II of Denmark) to French diplomat Henri de Laborde de Monpezat in Copenhagen, 10th June 1967. With them on the balcony are the bride's parents, King Frederick IX (right) and Queen Ingrid. (Photo by David Cairns/Express/Getty Images)