Kelly Osbourne is in the hospital and in stable condition following a Thursday incident in which she suffered a seizure while taping an episode of E!'s Fashion Police.

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"Thank U all 4 UR beautiful well wishes," Osbourne tweeted last night alongside a photo of an IV in her arm. "[Y]es I did have a seizure they are just trying to figure out why?"

Osbourne's representative told E! News on Thursday that the former The Osbournes star "was taken to a local hospital for further testing and is awake, alert and in stable condition," adding that she "will be staying overnight for observation as a precautionary measure."

Osbourne was carried off the set of Fashion Police on a stretcher Thursday afternoon and rushed to a hospital in Los Angeles following the incident, TMZ reported.

While filming the show in front of a live studio audience, the reality TV star reportedly turned to Melissa Rivers -- who was filling in for Giuliana Rancic -- and said, "I don't feel good."

Osbourne then fell out of her chair and allegedly began shaking on the floor. Rivers attempted to help her, but then a doctor ran up from the audience to assist.