Katie Price's son Harvey has been rushed to hospital to receive "urgent medical attention," her representative has confirmed.
Harvey, 18, has a number of health issues including Prader-Willi Syndrome, a genetic condition. He is also partially blind and on the autistic spectrum.
He fell ill at a small party for his younger sister Princess's 13th birthday, according to reports.
A representative for Katie told the Sun: "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.
"Katie recognised the signs and knew when to call an ambulance. He's expected to be discharged later today."
Standard Online has contacted Katie's representative for any further comment.
Earlier in the day, Katie shared a sweet birthday message for Princess, who is her eldest daughter.
"My first baby girl turning a teenager," she wrote. "She literally is me in EVERYWAY. Words are not enough to describe how much I love you!"
The former glamour model also revealed that now Princess has turned 13, she has allowed to create her own Instagram account - which has already amassed over 35,000 followers.