Kelly Osbourne could possibly be suffering from epilepsy, it has been reported.

According to sources who told TMZ, Kelly Osbourne’s seizure, which caused her to collapse on the set of her show on Thursday, may be related to the brain condition.

Kelly Osbourne, 28, is reportedly staying in hospital for a few more days as doctors run tests to determine her medical state.

Medical practitioners at the hospital are thought to believe that Kelly Osbourne may be epileptic.

The source, who is said to be close to Kelly Osbourne, told the website that doctors believe her seizure may have been an “isolated incident” and are now attempting to figure out how to prevent another episode from happening.

For the meantime, Kelly Osbourne is said to be on anti-seizure medication until her diagnosis is confirmed.

Kelly Osbourne confirmed that she collapsed on the set of Fashion Police on Thursday.

The reality star’s publicist had earlier tried to play down the incident after dramatic images emerged of her being carried off set to an ambulance.

Kelly Osbourne collapsed while filming her show Fashion Police, and was taken to a Los Angeles based hospital

But straight-talking Kelly Osbourne cleared up all doubt when she took to Twitter to explain to well-wishing fans what had happened.

She wrote: “Thank U all 4 UR beautiful well wishes yes I did have a seizure they are just trying to figure out why?”

Kelly, the daughter of Ozzy and Sharon Osbourne, collapsed while filming her E! show Fashion Police, and was taken to a Los Angeles based hospital where she was previously expected to stay just overnight.

She was recording the latest episode of the style programme alongside Joan and Melissa Rivers, who has been covering for usual panelist Giuliana Rancic.