U.K. Prime Minister Boris Johnson was released from intensive care on Thursday, after being admitted for coronavirus treatment.

"The Prime Minister has been moved this evening from intensive care back to the ward, where he will receive close monitoring during the early phase of his recovery," a spokesman for No. 10 Downing Street said in a statement to NBC News.

"He is in extremely good spirits," the spokesman said.

The Conservative Party leader announced on March 27 that he had contracted COVID-19, making him the first major governmental leader known to have contracted the virus.

Johnson, 55, tweeted Monday morning that had been admitted to St. Thomas' Hospital in London the previous night for "some routine tests" because he was still experiencing coronavirus symptoms. He previously said that he had been tested for the virus after coming down with "mild symptoms," including "a temperature and a persistent cough."

On Monday afternoon, a government spokesman said Johnson was moved to the ICU after his symptoms "worsened."