Prince Louis looked uncharacteristically shy when he joined his older siblings and the rest of the royal family at their annual Christmas Day church service. Making his festive debut, little Louis walked into St Mary Magdalene Church in Sandringham hand-in-hand with his proud parents, the Prince and Princess of Wales.
But some fans were left puzzled as to why the four-year-old was wearing shorts in the chilly December temperatures, especially as his big brother George was wearing trousers.
It turns out William and Kate's outfit choice was down to a very upper class tradition which dates back centuries.
