While watching the Trooping the Colour flypast from the Buckingham Palace balcony alongside his parents the Prince and Princess of Wales and siblings George and Princess Charlotte, the five-year-old appeared to pretend to ride a motorcycle and saluted the aircraft as they flew over.

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In pictures: King joined by royals for his first Trooping the Colour as monarch

He had earlier made a show of holding his nose while travelling with his mother, brother and sister in a carriage - possibly to ward off the smell of the plentiful horse dung along the route.

The young prince has a track record of lightening the mood at formal royal events, having previously endeared himself to the crowds at both the coronation this year and the Platinum Jubilee last year with a series of cheeky gestures.

Here are the many faces of Prince Louis at the Trooping the Colour parade.

Prince Louis at recent royal events