Britain's Prince William and his wife Kate published a photograph of their youngest child Louis to mark his third birthday on Friday (Apr 23).
The photograph was taken by Kate at Kensington Palace, the family's home in London, shortly before Louis left for his first day at a nearby nursery school.
The picture showed Louis smiling on a red bicycle with a school bag strapped on his back.
The Duke and Duchess of Cambridge traditionally release images of their children on special occasions such as their birthdays or Christmas and mum Kate is usually the photographer.
Last year's photo of Louis showed the young prince with multi-coloured paint on his hands after working on a craft project.
Louis is the youngest of the royal couple's three children: George is seven years old and Charlotte is five.