Background
the eldest sister of King Carl XVI Gustaf of Sweden and a first cousin of Queen Margrethe II of Denmark. She is also the first child of Prince Gustaf Adolf, Duke of Västerbotten, and Princess Sibylla of Saxe-Coburg-Gotha, and granddaughter of King Gustaf VI Adolf of Sweden and Crown Princess Margareta of Sweden. Being the eldest child she, although, as a female was never heir to the throne according to the Swedish constitution current at the time.
Princess Margaretha met her future husband, the ten year older businessman John Ambler, at a dinner party in the United Kingdom in 1963 and their engagement was announced on 28 February 1964. They were married on 30 June 1964 and settled in Oxfordshire. As a result of her unequal marriage, she lost her style of Royal Highness and became Princess Margaretha, Mrs. Ambler.
Princess Margaretha and her husband separated in 1994, but never divorced. He died on 31 May 2008. The couple has three children.