King Haakon VIII became king following the death of his father, King Harald V, on August 28, 2026, at the age of 89. ^[1] King Haakon VIII took his Oath of Allegiance to the Norwegian Constitution before the Storting on Tuesday, September 1, 2026. ^[2] Princess Ingrid Alexandra of Norway officially became the heir to the throne at age 22 following the accession of her father, King Haakon. ^[3] Crown Princess Ingrid Alexandra is the first Norwegian royal heir whose position has been shaped entirely by the country's 1990 succession reform, which introduced absolute primogeniture. ^[4] Crown Princess Ingrid Alexandra, born on January 21, 2004, is the first new heir apparent in Norway's modern royal history to already be an adult when her parent became monarch. ^[5] Princess Ingrid Alexandra is the first female monarch in Norway in over six centuries, with the last woman to hold the position being Queen Margaret, who reigned between 1388 and 1412. ^[6]