King Harald and Queen Sonja’s once “forbidden romance” and tumultuous nine-year courtship is the subject of Prime Video’s new series ‘Harald and Sonja,’ out Feb. 14 on the streaming service.

King Harald, 87, and Queen Sonja, also 87, have been married since 1968 — 57 years! — and fell in love at first sight upon meeting. But, as with many royal love stories, their quest to be ...