• In 2005, Prince Harry wore a Nazi uniform to a costume party
  • Photos of the incident caused a major controversy
  • In his new book, Harry connects William and Kate to the costume

These days, the British Royal Family is consumed by scandals involving Harry and Meghan, and their allegations against royals like King Charles and Prince William.

But years before all that, one of the family's biggest controversies came when a young Prince Harry wore a Nazi uniform to a costume party.

Harry recently called the incident "one of the biggest mistakes" of his life. But in a new leak from his memoir Spare, the royal shared the full story behind the costume.

Prince Harry: William and Kate told me to wear Nazi costume

It turns out Prince William and Kate Middleton played a part in the costume, according to Harry. The preview from Harry's book comes from Page Six.

In it, Harry writes that the costume party had a "Native and Colonial" theme. He was debating between wearing the Nazi uniform and a pilot's outfit: "I phoned Willy and Kate, asked what they thought. Nazi uniform, they said."

Also interesting:

William and Kate "both howled" at the Nazi outfit, Harry claims. Apparently, Prince William also attended the party, but wore an inoffensive lion costume.

"Worse than Willy's leotard outfit! Way more ridiculous! Which, again, was the point," Harry recalls William and Kate saying of the Nazi uniform.

Over the years, Prince Harry has expressed remorse for the offensive costume. But he reportedly also resented how his older brother was never connected to the incident...

See more in the video above.