Hedwig Elisabeth Charlotte of Holstein-Gottorp (Swedish: Hedvig Elisabet Charlotta; 22 March 1759 – 20 June 1818) was Queen of Sweden and Norway as the wife of King Charles XIII and II. She was also a famed diarist, memoirist and wit. She is generally known in Sweden by her full pen name in Swedish (above), though her official name as queen was Charlotta.
She was born in Eutin the daughter of Duke Frederick August I of Holstein-Gottorp and Princess Ulrike Friederike Wilhelmine of Hesse-Kassel. She grew up in Eutin and married her cousin Charles, Duke of Södermanland, in Stockholm on 7 July 1774 when she was fifteen years old. The marriage was arranged by King Gustav III to provide the throne of Sweden with an heir. The King had not consummated his marriage and had decided to give the task of providing an heir to the throne to his brother.