In 1968, King Harald V married Sonja Haraldsen, a commoner who was not of royal blood. It was a scandal at the time, but the king didn't care - he was smitten. And let me tell you, their love has lasted longer than a Norwegian winter, which is saying something.
Norway King Harald V hospitalised over fluid retention; Crown Prince
Together, they have two children, Crown Prince Haakon and Princess Märtha Louise, who are both grown up now and making their parents proud. And fun fact: Princess Märtha Louise is a trained physiotherapist, because even royals need to have a backup plan.