Boris Johnson has received oxygen in intensive care but isn't on a ventilator, according to cabinet Minister Michael Gove.
The British Prime Minister's coronavirus symptoms worsened last night, 10 days after being diagnosed.
He's been suffering breathing difficulties, as well as a cough and a high temperature.
An update on his condition is expected at midday.
Michael Gove says the Prime Minister is getting the best possible care.
"We're all hoping and praying that the Prime Minister makes the speediest possible recovery.
"We know that the Prime Minister was taken into intensive care last night at 7 o'clock - Number 10 released a statement at 8.
"The Prime Minister is getting the best possible care from the team of doctors at St Thomas's.
"There'll be updates from Number 10 throughout the day."