Queen Elizabeth has tested positive for the coronavirus, UK officials announced on Sunday.
"The queen has today tested positive for COVID," Buckingham Palace said in a statement. "Her Majesty is experiencing mild cold like symptoms but expects to continue light duties at Windsor over the coming week."
"She will continue to receive medical attention and will follow all the appropriate guidelines," they added.
Both the Queen's son, Prince Charles, and his wife Camilla tested positive for COVID earlier this month, though it wasn't immediately clear if the UK head of state became infected due to contact with the other two royals.
The 95-year-old has already had three coronavirus vaccines.
Senior politicians have been posting get well wishes for the monarch on social media platforms.
"I’m sure I speak for everyone in wishing Her Majesty The Queen a swift recovery from Covid and a rapid return to vibrant good health," tweeted Prime Minister Boris Johnson.?
"On behalf of myself and the whole of UK Labour, wishing Her Majesty The Queen good health and a speedy recovery. Get well soon, Ma’am," oppposition Labour leader Keir Starmer tweeted.
London Mayor Sadiq Khan spoke of the Queen's commitment to the country and said she "continues to be unwavering."
People who test positive for the virus are required to self-isolate for at least five days, though the British government plans to lift that restriction for England in the coming week.
On February 6, the Queen marked 70 years on the British throne.