James Corden spearheaded the idea to have a dance-off between Prince Harry, his brother Prince William and their father Prince Charles at his wedding reception over the weekend.
The 'Late Late Show' host - who has been seen on boozy nights out with the flame-haired hunk in the past - reportedly spearheaded a dance floor showdown between the royal relatives at the exclusive after-party at Frogmore House in Windsor.
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A source told The Sun newspaper: "James Corden did his best to entertain and it went down an absolute treat. He even compered a dance-off between Harry, Charles and William. Everyone was laughing because it's something no one expected."
Harry's new wife the Duchess of Sussex - who was known as Meghan Markle before she got married - also joined in the excitement along with her mother Doria Ragland.
And it reportedly didn't take long until some of the other guests - including Princess Eugenie and her sister Beatrice - were up on their feet boogying away.
The dance-off seemingly wore Charles, 69, out as him and his wife Duchess Camilla left the party at around 11pm, while some of the guests lasted through until 1am.