Queen Elizabeth II waved to onlookers during the Queen's diamond jubilee in London.

Queen Elizabeth joined an armada of 1,000 vessels on Sunday on London's River Thames.

Revellers wearing crowns joined the four-day fete that started Saturday.

Hundreds of rowing boats, barges, and steamers filled the River Thames with a blaze of color.

Queen Elizabeth traveled on a launch boat that was taken to the royal barge, the principal boat of a flotilla of 1,000 vessels.

In terms of sheer pageantry, it will dwarf last year’s nuptials of her grandson Prince William and his bride, Catherine Middleton, the Duchess of Cambridge.

Fireworks exploded above Tower Bridge during the jubilee.

From left to right, Prince Harry, Kate Middleton, and Prince William, Duke of Cambridge, on the royal barge "Spirit of Chartwell."

From left to right, Prince Philip, The Duke of Edinburgh; Queen Elizabeth II; Camilla, Duchess of Cornwall; and Kate Middleton, aboard the "Spirit of Chartwell."

People lining the river bank waved British Union flags as the royal barged passed by.

Prince Edward, Earl of Wessex (left), and Sophia Helen Rhys-Jones, Countess of Wessex, reacted to a musical performance aboard the "Havengore."

The "Spirit of Chartwell" passed crowds of onlookers.

Crowds by the river cheered as the flotilla passed Tower Bridge.

Princess Beatrice of York and Sophie, Countess of Wessex, waved to well-wishers.

Guns fired in a 41-gun salute at the Tower of London in front of Tower Bridge.

Members of Queen Elizabeth II 's Royal Marine Band, Plymouth, played in the pouring rain during the jubilee.