Kristy Swanson, star of the 1992 movie "Buffy the Vampire Slayer" and a vocal supporter of former President TrumpDonald TrumpTrump lawyers to Supreme Court: Jan. 6 committee 'will not be harmed by delay' Two House Democrats announce they won't seek reelection DiCaprio on climate change: 'Vote for people that are sane' MORE, says she's been hospitalized after testing positive for COVID-19.

The 51-year-old performer told her nearly 400,000 Twitter followers on Monday that she was "at the tail end" of her coronavirus diagnosis when pneumonia "jumped into" her lungs.

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The "Pretty in Pink" and "Dude, Where's My Car?" actor is an outspoken backer of the 45th president. In 2019, she worked on a stage play based on the anti-Trump text exchanges between former FBI agent Peter Strzok and lawyer Lisa Page.

The entertainer met with Trump at the White House in February of last year and pinned a tweet of herself posing in the Oval Office with him.

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Swanson did not indicate whether or not she had been vaccinated against COVID-19. In September, she suggested vaccine mandates were a way to "make mo-money."

In a series of Monday tweets, Swanson told fans that she was "OK" and was being treated with blood thinners and baricitinib while in the hospital.

She posted thanks for messages of support, including from fellow "Pretty in Pink" star Jon Cryer, a frequent Trump critic.