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Prince Louis has been spotted at his first Trooping the Colour ceremony alongside his sister Princess Charlotte.
The adorable young royals were spotted peering from the windows of Buckingham Palace during the parade on Saturday.
Charlotte waved to crowds as the spectacle was under way today, while Louis appeared grumpy despite the lavish ceremony.
Military pomp and pageantry was on display to celebrate the Queen's official birthday.
Charlotte waves from the windows of Buckingham PalaceGetty ImagesHer Majesty's milestone was marked with the Trooping the Colour that featured some of Britain's most prestigious regiments.
Among the royals to attend was Meghan, who arrived for her first official royal engagement since giving birth to son Archie just over four weeks ago.
Kate, the Duchess of Cambridge, smiles as she returns to Buckingham Palace after the Trooping the Colour paradeAFP/Getty ImagesThe duchess has been on maternity leave caring for her baby born at a private London hospital on May 6, and Harry has already spoken about how parenthood has changed their lives, saying he cannot imagine life without his son.
Trooping the Colour is a social as well as a ceremonial occasion and in the stands overlooking the parade ground were the wives, girlfriends and parents of the guardsmen and officers on parade.
The event featured around 1,400 servicemen in total and hundreds of Guardsmen were lined up on the parade ground waiting to be inspected by the Queen.
The colour, or ceremonial regimental flag, being paraded this year was from the 1st Battalion Grenadier Guards, a frontline infantry regiment of the British Army when not performing ceremonial duties.
Their lineage can be traced back to 1656 when the military unit was raised as the sovereign's bodyguards by King Charles II while in exile in Bruges.