Although Queen Elizabeth II's birthday is April 21, Saturday was her "official" birthday, as it's customary to celebrate her birthday publicly during the summer when the weather is nice. To commemorate the occasion, the royal family and regiments of the United Kingdom's military paraded through the streets of London for the annual Trooping the Color.

>> Prince George, Princess Charlotte steal the show at Queen's Trooping the Color parade

The Queen and Prince Phillip traveled in a carriage, as did Duchess Camilla, Prince Harry and Duchess Kate. As is the custom, Prince William, Prince Charles and Princess Anne rode on horseback.

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