Whenever a single member of the royal family is linked to a potential love interest, fans around the world are filled with excitement at the prospect of a new real-life fairytale.
Take Prince William's romance with university girlfriend Kate Middleton, or Harry's long-distance relationship with US actress Meghan Makle.
So imagine the excitement back in the 1970s when there were rumours that King Charles, then the Prince of Wales, was growing close to a certain Hollywood and Broadway megastar. In 1974, there were reports that the heir to the throne had struck up a bond Hollywood royalty Barbra Streisand and the pair had become firm friends.