The King and his sister were honouring the British Army's most senior regiments, the Life Guards and the Blues & Royals ...

At Windsor Castle, The King, Colonel in Chief of The Household Cavalry, and The Princess Royal, Colonel of The Blues and ...

King Charles and Princess Royal performed one of their major royal duties at Windsor Castle.Taking to Instagram on Monday, ...

The Household Cavalry are being presented with their new standards - a type of flag used for ceremonial purposes.

So she wore military costume, the Uniform of the Blues and Royals, complete with a garter sash and star and full sized medals. But the real star: a triangle-shaped hat with a large, red feather.

The Royals announced they will be wearing full ... What do you think of the full powder blues? What do you think of the alternate hat?

Prince George, 4, matched uncle Harry and dad William in a tinier version of the Blues and Royals coat and black pants Dana Rose Falcone is a Staff Writer covering TV at PEOPLE. She has been ...