Official celebrations marking Queen Elizabeth's 90th birthday continue in London today.

The Queen and other members of the royal family gathered on the Buckingham Palace balcony to watch a flypast of Royal Air Force jets and planes from the Second World War.

Earlier, the Queen sat at ground level to oversee a military parade known as Trooping the Colour, featuring more than 1,500 soldiers and several hundred horses.

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Prince William, centre, rides a horse, during the Trooping the Colour parade, along with his father Prince Charles, left, and aunt Princess Anne, right. (Tim Ireland/Associated Press)

Grandson Prince William, his father Prince Charles and aunt Princess Anne rode horses during the parade, a tradition that originates from preparations for battle, when flags are carried or "trooped" down the rank for soldiers to see.

 Following the ceremony, thousands of people lined the Mall near Buckingham Palace to pay their respects.

Next in the lineup was a river pageant on the Thames. The flotilla included the royal barge Gloriana, the historic launch Havengore and a group of Dunkirk little ships.

They moved downstream from Westminster Palace and along the way passed the London Eye, Shakespeare's Globe and the Tower of London.

As the vessels reached Tower Bridge, it lifted and the flotilla passed underneath, marking the end of the pageant.

On Sunday, the party will include the Patron's Lunch to honour the Queen for her support of several charities.

The festivities were scheduled to unfold over three days. They kicked off on Friday with a Thanksgiving Service at St. Paul's Cathedral.

Four carriages carried members of the royal family to the palace for Saturday's ceremonies.

Prince Philip and the Queen, who wore a bright green outfit, were in the last carriage.

The Queen actually turned 90 on April 21, but official celebrations are held in June, a long-standing tradition.

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This little girl was among those who waited outside Buckingham Palace to see the Queen. (Ellen Mauro/CBC)

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Camilla, Duchess of Cornwall, and Catherine, Duchess of Cambridge, travel in a carriage to take part in Saturday's festivities honouring the Queen. (Toby Melville/Reuters)

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Sophie, Countess of Wessex, and Prince Edward arrive for the Trooping the Colour ceremony in central London. (Dylan Martinez/Reuters)

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From the left, Prince Charles, Catherine the Duchess of Cambridge, Princess Charlotte, Prince George, Prince William the Duke of Cambridge, Prince Harry, Queen Elizabeth and Prince Philip, watch the flypast, marking the Queen's 90th birthday. (Ben A. Pruchnie/Getty Images)

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Guardsmen march for the Trooping the Colour ceremony in central London to honour the Queen during her official 90th birthday celebration. (Dylan Martinez/Dylan Martinez)


 

With files from The Associated Press