Haakon, 48, ascended the throne ahead of his older sister Princess Märtha Louise, 50, who now lives in the US with her boyfriend, the spiritual leader Shaman Durek.
Their father King Harald, 84, ascended the throne in 1991.
Ingrid has a younger brother, Prince Sverre Magnus, 16, and an older half-brother on her mother’s side, Marius Borg Høiby.
The previous Norwegian Queen was Queen Margaret, who reigned over Norway, Denmark and Sweden from the late 1380s until her death in 1412.
Secondary school student Ingrid Alexandra is an avid skier, boxer and surfer.