Ever noticed that every time you see a photo of Prince Louis, the royal tot is wearing shorts? It's hardly surprising when he's being snapped in the summer months, like the gorgeous Father's Day pictures the Cambridges shared back in June, but it's slightly different when the weather isn't quite as warm.
And it was the same for his big brother Prince George, who was always pictured in shorts, wherever he was, whatever the weather.
But more recently we've seen George sporting smart trousers, while Louis is still in his shorts. But why? According to etiquette expert William Hanson, the reason behind the Duke and Duchess of Cambridge's outfit choices is tradition - and essentially because they are rather posh.
Read more on mirror.co.uk