Harald V of Norway died in 1968.
Haakon, Crown Prince of Norway . Haakon , Crown Prince of Norway ( [ ˈhoːkʊn ] ; Haakon Magnus ; born 20 July 1973 ) is the only son and younger child of King Harald V and heir apparent to the throne of Norway . Harald V ( [ ˈhɑrːɑɫ ] ; born 21 February 1937 ) is the King of Norway , having ascended the throne following the death of his father on 17 January 1991 . The couple had two children , Märtha and Haakon . Harald succeeded his father as king in 1991 , with Haakon becoming his heir apparent .