Queen Elizabeth II and family mark 90th birthday with parade
Watch: Large crowds gather in London to celebrate the queen's official 90th birthday, and to observe the ceremonial parade held in her honor.
Queen Elizabeth II and her family marked her official 90th birthday with a parade, a colorful military ceremony and an appearance on the Buckingham Palace balcony.
The queen and her husband, Prince Philip, were to join the Trooping the Color parade, traveling by vintage carriage.
Large crowds came to mark her milestone and to enjoy the procession, featuring more than 1,500 soldiers and officers and several hundred horses.
Later, the royal couple were set to lead the family onto the palace balcony to wave to the throngs as Royal Air Force jets and some vintage World War II planes fly overhead.
The festivities continue Sunday with a massive street party in front of the palace. The palace has invited roughly 10,000 people who work at charities supported by the queen to the open air festivities.
Street parties will also be held in many towns and cities throughout Britain and in other Commonwealth countries.
The queen's real birthday is in April. The official birthday is timed in hope of fair weather - a custom that began in the 18th century.
