Kelly Osbourne has been rushed to hospital after reportedly suffering a seizure.
The 28-year-old reality star was filming her US reality show Fashion Police when she was struck by sudden and uncontrollable convulsions, according to Entertainment Tonight.
The seizure reportedly lasted 30 seconds and occurred at the end of a one-hour taping.
Osbourne's co-stars Joan and Melissa Rivers were both on set at the time.
The outlet reports Kelly has been taken to a Los Angeles-area hospital for treatment.
The Osbourne family has yet to issue a statement about her condition. Further details were unknown at press time.
Osbourne is still believed to be recovering from an ankle injury suffered last month.
The television star recently showed off a bulky blue leg brace via a photograph on her Twitter page.
"Got my shoe stuck in a bathroom drain. I was faced w/ spraining my ankle or eating the toilet! Guess what I picked?" she wrote, musing, "However I'm now questioning my decision due to the pain!!!!"
Kelly was admitted to rehab in 2004 for an addiction to painkillers.
She reportedly checked into hospital a year later after suffering a relapse, and entered another addiction treatment programme in 2009.
Osbourne's health scare follows her brother Jack's diagnosis with Multiple Sclerosis last year.
Her mother, Sharon, survived colon cancer following a 2002 diagnosis and underwent a double mastectomy last November after doctors discovered she carried the gene for breast cancer.
- Cover Media