Queen Elizabeth II, is the longest UK serving monarch, and has died at Balmoral aged 96, after reigning for over 70 years.
The Queen died peacefully on Thursday afternoon at her estate located in Scottish, where she had spent much of the summer.
Queen Elizabeth II came to power in 1952 and witnessed enormous social change.
Her son King Charles III said the death of his beloved mother was a “moment of great sadness” for him and his family and that her loss would be “deeply felt” across the world.
In a statement He said:
“We mourn profoundly the passing of a cherished sovereign and a much-loved mother.
“I know her loss will be deeply felt throughout the country, the realms and the Commonwealth, and by countless people around the world.”
During the coming period of mourning, prince Charles said him and his family would be “comforted and sustained by our knowledge of the respect and deep affection in which the Queen was so widely held”.
The King and his wife, Camilla, now Queen Consort, will return to London on Friday, Buckingham Palace said.
Senior royals had gathered at Balmoral after the Queen’s doctors became concerned about her health earlier in the day.
All the Queen’s children travelled to Balmoral, near Aberdeen, after doctors placed the Queen under medical supervision.
Her grandson and now heir to the throne, Prince William, and his brother, Prince Harry, also gathered there.