Britain's Queen Elizabeth II is celebrating s her 91st birthday, in a notably more low-key affair after a year of festivities to mark her hitting 90.
A further 62 Volleys were also fired at the Tower of London.
In 2015, she surpassed the reign of her great-great-grandmother, Queen Victoria, to become the longest-reigning British monarch and the longest-reigning queen regnant and female head of state in world history.
As per tradition, the King's Troop, Royal Horse Artillery staged a 41-gun salute in London's Hyde Park in honour of the Queen, who celebrated her birthday privately at Windsor Castle.
The Queen Elizabeth was born on April 21, 1926 in Bruton Street in central London when Calvin Coolidge was USA president and Joseph Stalin had just taken control of the Soviet Union.
So instead, he combined his birthday celebration with an annual spring military parade known as Trooping the Colour, in which regiments displayed their flags or "colours" so soldiers would be familiar with them.
On her 91st birthday, we thank God for the life and example of Queen Elizabeth II, and ask him to grant her many more years.
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To mark the Queens Birthday, Buckingham Palace shared a christening photo of the future monarch from 1926, and the royal family shared a 1952 photo of Queen Elizabeth and Prince Charles.
The Queen earned the nation's love and admiration by refusing to be political as well as making her family's image become more modern.
However, she is still seen out and about at various events - most recently feeding a banana to an elephant at Whipsnade Zoo in Bedfordshire to mark the opening of a new centre for Asian elephants. She is expected to spend the milestone at Windsor Castle.
However, this isn't the only time this year that the Queen will be marking the occasion.
13 - prime ministers in office since the start of her reign.
The intrusion took place before the first race while the Queen, who turned 91 today, had a runner in the third race. The Queen reached her Sapphire Jubilee in February 2017.