• Prince Harry is the son of King Charles and the late Princess Diana
  • An old rumour suggests Harry's real father is James Hewitt
  • Harry claims Charles made an "in poor taste" joke about it all

Prince Harry has claimed that King Charles III used to make jokes about not being his biological father. That's according to new previews from his memoir Spare.

The story goes like this. Harry writes, according to the Daily Mail, that Charles always "liked telling stories."

One of his favourites involved a mentally ill man who would claim he was the real Prince of Wales.

Charles to Harry: "Who knows if I'm even your real father?"

Harry continues: "[Charles would] always end with a burst of philosophizing … Who knows if I'm really the Prince of Wales? Who knows if I'm even your real father?"

Prince Harry says his father would "laugh and laugh," but he found it all "remarkably unfunny."

Also interesting:

"Given the rumor circulating just then that my actual father was one of Mummy’s former lovers: Major James Hewitt," writes Prince Harry in Spare.

"One cause of this rumor was Major Hewitt’s flaming ginger hair, but another cause was sadism."

Apparently, Prince Harry adds that the joke was "in poor taste," though he and his father never directly discussed his mother's affair with James Hewitt...

See more in the video above.