President-elect William Ruto mourns Queen Elizabeth II

President-elect William Ruto. [File, Standard]

Kenya's president-elect William Ruto has joined the world in mourning Queen Elizabeth II.

The Queen passed away on Thursday, September 8 afternoon at Balmoral Castle, Scotland after a long illness.

Following the announcement of her death, Ruto took to his Twitter account to mourn the departed queen.

He described her leadership as 'admirable'.

"I have received news of the death of Queen Elizabeth II and I send condolences to the people of the United Kingdom. The queen's leadership of the Commonwealth for the past seven decades is admirable," Ruto said.

According to the president-elect, Queen Elizabeth steered the institution's [monarch] evolution into a forum for effective multilateral engagement.

He added that the queen's reign had the 'potential to drive tremendous socioeconomic progress to remain incontestable and redounds to the Queen's historic legacy.'

"We will miss the cordial ties she enjoyed with Kenya and may her memories continue to inspire us. We join the Commonwealth in mourning and offer our condolences to the Royal Family and the United Kingdom," he said.

Queen Elizabeth II, Britain's longest-reigning monarch and a rock of stability across much of a turbulent century died after 70 years on the throne. She was 96.

The palace announced she died at her summer residence in Scotland, where members of the royal family had rushed to her side after her health took a turn for the worse.

A link to the almost-vanished generation that fought World War II, she was the only monarch most Britons have ever known, and her name defines an age: the modern Elizabethan Era.

The impact of her loss will be huge and unpredictable, both for the nation and for the monarchy, an institution she helped stabilise and modernise across decades of huge social change and family scandals.

With the death of the queen, her 73-year-old son Charles automatically becomes monarch, though the coronation might not take place for months. It is not known whether he will choose to call himself King Charles III or some other name.