Katie Price's disabled son Harvey Price has been rushed to hospital today requiring "urgent medical care".

The 18-year-old suffers from Prader-Willi syndrome, which causes weight gain and erratic behaviour, as well as partial blindness, diabetes and autism.

According to The Sun, Harvey fell ill at younger sister Princess's 13th birthday party today and was taken away from their Surrey home by ambulance.

"Harvey has been taken to a local hospital for tests - he wasn't feeling well yesterday and has today has presented symptoms that require urgent medical attention," a family representative told the newspaper.

"Katie recognised the signs and knew when to call an ambulance. He's expected to be discharged later today."

The exact nature of Harvey's illness is unknown.