Heiress Presumptive
At the time of her birth, only males could ascend the throne of Denmark, owing to the changes in succession laws enacted in the 1850s when the Glücksburg branch was chosen to succeed. As she had no brothers, it was assumed that her uncle Prince Knud would one day assume the throne.
The process of changing the constitution started in 1947, not long after her father ascended the throne and it became clear that Queen Ingrid would have no more children. The popularity of Frederik and his daughters and the more prominent role of women in Danish life started the complicated process of altering the constitution. That proposal had to be passed by two Parliaments in succession and then by a referendum, which was held on 27 March 1953. The new Act of Succession permitted female succession to the throne of Denmark, according to male-preference cognatic primogeniture, where a female can ascend to the throne only if she does not have a brother. Princess Margrethe therefore became heiress presumptive.
On her eighteenth birthday, 16 April 1958, Margrethe was given a seat in the Council of State. She subsequently chaired the meetings of the Council in the absence of the King.
In mid-1960, together with the princesses of Sweden and Norway, she traveled to the United States, which included a visit to Los Angeles, California, and to the Paramount Studios, where they were met by several celebrities, including Dean Martin, Jerry Lewis and Elvis Presley.
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