King Charles Cracks an Unexpected Joke on the Morning of His Coronation in New Documentary

The King and Queen allowed cameras to capture the first year of Charles' reign

<p>Max Mumby/Indigo/Getty</p> King Charles and Prince George on May 6 at the coronation of King Charles and Queen Camilla

Max Mumby/Indigo/Getty

King Charles and Prince George on May 6 at the coronation of King Charles and Queen Camilla

Amid all the pomp and circumstance surrounding the morning of his coronation, King Charles managed to show off his sense of humor!

Unseen moments from Charles' coronation were captured by cameras for the upcoming 90-minute BBC documentary, Charles III: The Coronation Year, which airs on Dec. 26 in the U.K.

In a clip of the film, Charles, 75, is seen walking down a corridor in Buckingham Palace on the morning of his May 6 coronation supported by his page boys, including grandson Prince George, 10. As he approaches his close aide, Charles flaps his coronation robes and tells his equerry in a silly voice: "I can fly!"

The documentary also features interviews with key players from the coronation, including the Archbishop of Canterbury, the Most Reverend Justin Welby, who (to Charles’ delight!) is seen fluffing his lines during the run-through of a prayer at the coronation rehearsal) and one of Queen Camilla’s oldest friends Fiona, Marchioness of Lansdowne, who was an attendant, or 'companion,' to Camilla on the day.

Related: See King Charles and Queen Camilla's Coronation Outfits Up Close in New Buckingham Palace Display

<p>Phil Noble - WPA Pool/Getty Images</p> King Charles at his coronation on May 6

Phil Noble - WPA Pool/Getty Images

King Charles at his coronation on May 6

Another contributor is Camilla’s sister Annabel Elliot, who tears up as she watches her sister, the new Queen, take off for the historic ceremony at Westminster Abbey.

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"When I thought back to being 2 years old and watching the [the late Queen Elizabeth's] coronation on a tiny black and white television and there goes this golden coach with my sister in it," she says in the documentary. "I can't explain the feeling because it’s so surreal. This cannot be happening. It was quite a moment."

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