The Queen was greeted by cheers and applause as she arrived for a day at the races at Royal Ascot.
Shouts of "God save the Queen" rang out around the Berkshire racecourse's parade ground as she entered in a traditional horse-drawn royal carriage procession.
The Queen was accompanied by the Duke of Edinburgh, who appeared fit and well following his recent stay in hospital that caused him to miss part of the Diamond Jubilee celebrations.
The royal couple waved at the crowds as they made their way down the racecourse, many racegoers giving three cheers for the Queen as the carriage went past.
Umbrellas had been stowed away in each carriage, but despite a few clouds in the sky, the sun shone on the royals.
The Queen - whose choice of hat colour is always the subject of frenzied bets - wore a dress and coat in pale blue by Stewart Parvin with a matching hat by Rachel Trevor-Morgan. She and the Duke were joined by Viscount Ullswater and Lord Vestey.
The Duchess of Cornwall, following in the second carriage with the Prince of Wales, wore a stone-coloured dress and coat by Anna Valentine, a Philip Treacy hat and gold Jimmy Choo shoes.
One cheeky racegoer shouted out: "Charlie!" as the carriage went by, causing the Prince of Wales to turn around with a smile and wave.
Princess Eugenie, riding in the third carriage, wore a teal dress with black lace shoulder detail and a fishtail skirt.
Many racegoers chose to wear red, white and blue in celebration of the Jubilee year, others wearing Union Jack hats.