He joined the other royal colonels riding behind the Queen's Ascot Landau carriage, Charles who is Colonel of the Welsh Guards, Anne, Colonel of the Blues and Royals, and William, Colonel of the Irish Guards. The tiny princess waved and squinted as she looked up at the sky to see the Royal Air Force's flypast. Queen Elizabeth II already turned 92 years old on her real birthday, April 21.
Since her 2011 Trooping the Colour debut, Kate Middleton has never worn short sleeves, and neither did Princess Diana.
Prince Philip, the Duke of Edinburgh, who celebrates his 97th birthday tomorrow, has retired from official public duties and is not expected to attend.
Charanpreet Singh Lall, 22, was among more than 1,000 soldiers who participated in the ceremony attended by the Queen and members of the royal family, including the newly married Duke and Duchess of Sussex, Prince Charles and the Duke and Duchess of Cambridge. Meghan Markle and Prince Harry made their first post-honeymoon appearance together again and it looked like Princess Charlotte and Prince George are a big fan of their new auntie!
Camilla wore a pale blue silk dress and coat by Bruce Oldfield and a hat by Philip Treacy.
Write Royalty, analysing details from the Court Circular, the official diary of the royal family, said the queen had conducted 125 engagements from January to the end of May.
Buckingham Palace tweeted that she had only missed one such event during her reign, and that was in 1955 during the country's general strike.
On Saturday, the Queen, who last month had a successful day procedure to remove a cataract, left Buckingham Palace at 10.45am (local time) for the ceremony.
This year's parade also saw the first time a guard has worn a turban during the ceremony. It originates from traditional battle preparations, where flags were "trooped" - ie carried - slowly through the ranks so they could be seen by all soldiers, so they could recognise them during combat.