As Prince Christian came of age, he was joined by other young future monarchs to celebrate his 18th birthday.

The young heirs joined for a photo in the Fløylsgemakket of Christiansborg Palace, much like they did a year ago for Princess Ingrid Alexandra’s 18th birthday in Norway.

The photograph features 11-year-old Princess Estelle of Sweden (second in line to the Swedish throne), 19-year-old Princess Ingrid Alexandra of Norway (second in line to the Norwegian throne), 18-year-old Prince Christian (second in line to the Danish throne), 19-year-old Princess Amalia of the Netherlands (first in line to the Dutch throne) and 21-year-old Princess Elisabeth of Belgium (first in line to the Belgian throne).

Not all future monarchs of this generation were present at the festivities. Prince Charles of Luxembourg, Hereditary Prince Jacques of Monaco, Princess Leonor of Spain and Prince George were absent as their countries did not send representatives to Denmark.

In 2022, many future monarchs were present for Princess Ingrid Alexandra’s 18th birthday in Norway, where a similar photo was taken at the Royal Palace of Oslo. The photo taken then was slightly different than the 2023 version: Prince Christian was not present for this celebration, but young Prince Charles of Luxembourg was.