Even royals can lighten up and indulge themselves in a little bit of fun and games from time to time.
Britain's Camilla, the Duchess of Cornwall, has recently confessed she is addicted to Sudoku.
Camilla, the wife of Prince Charles, revealed her obsession with the logic puzzle whilst touring a project for inner-city children during her royal visit to New York.
Camilla said, "I love Sudoku - I'm addicted to it. I wish I had my spectacles with me, I'd have finished this right away."
The duchess, who was meeting children preparing for a maths competition at Harlem Children's Zone, amazed the youngsters with her Sudoku skills.
She eventually had to be dragged away from her game by royal aides, who feared she was getting behind schedule on the whistle-stop official tour.
Camilla, 59, wearing a brown wool coat with fake leopard-skin cuffs, wowed her young audience as she raced through the puzzle, whilst explaining the rules to them.
Children's Zone worker Heidi Lopez, 24, told Britain's The Sun newspaper, "Camilla was a whiz. She was showing me her strategies, and was solving the puzzle in no time."
Sudoku was developed in the U.S. but became a craze in Japan in the '80s and a worldwide hit in 2005.