Queen Elizabeth II has become Britain's first ever monarch to mark her Sapphire Jubilee on 6 February 2017. It's 65 years since she became Queen following the death of her father King George VI. Princess Elizabeth, who was then 25 years old, was in Kenya on a royal tour with her husband Prince Philip at the time.
As Britain's longest reigning sovereign, this is a milestone in her reign that the UK has never seen before with any other monarch.
To mark the occasion Buckingham Palace re-released a photograph of the Queen wearing distinctive sapphire jewellery, given to her by King George VI as a wedding present in 1947.
The picture was taken by the photographer David Bailey in 2014 for the GREAT campaign, a publicity campaign to promote Britain around the world.
To mark the day gun salutes were fired in Green Park and at The Tower of London. But there are no grand national celebrations planned for the Sapphire Jubilee.
