Queen Elizabeth II is poised to deliver a rare televised address to the United Kingdom about the coronavirus.

The message, which was prerecorded at Windsor Castle, will air on Sunday night.

Buckingham Palace said in a Friday statement that the "special broadcast" would be "in relation to the coronavirus outbreak."

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The address is an unusual move by the 93-year-old British monarch, who, beyond her annual Christmas message, has only appeared on TV to address the nation a handful of times over the years.

She took to the airwaves during the Gulf War and after Princess Diana's death in a car crash in 1997.

Elizabeth's son, Prince Charles, announced last month that he had tested positive for COVID-19. A palace spokesman said earlier this week that the queen's 71-year-old son was in good health and out of self-isolation in Scotland.

The queen has been quarantined in Windsor, England, along with her husband, Prince Philip.

The United Kingdom saw its largest single-day death toll from the coronavirus on Tuesday with 563 deaths, according to data released by the British government.

The 31 percent spike brought the national total to at least 2,352 deaths from the pandemic.