Queen Elizabeth II: The second-longest serving monarch Queen Elizabeth dies at 96

At 96, Queen Elizabeth II passed away at her Balmoral estate in Scotland, Buckingham Palace announced on Thursday.

She is the longest-serving monarch in the history of the United Kingdom, having held the position for more than 70 years.

As concerned about her health earlier in the day, senior royals gathered at her Scottish estate.

"I and my entire family grieve with great sadness over the death of my beloved mother, Her Majesty The Queen," said the new king, her oldest son Charles.

She presided over the last throes of the British empire and weathered global upheaval and scandal. She brought a dramatic modernization of the monarchy after the death of her father, King George VI.

One of the most recognizable women in history, Elizabeth I ruled the United Kingdom and 14 other Commonwealth realms.

As the UK's new prime minister, the Queen formally appointed Liz Truss on Tuesday.

During the performance, the audience captured a photograph of the monarch smiling and holding a walking stick.