A 17-year-old UK girl, who was suffering from an incurable premature ageing disease and gave her the body of a 104-year old, has died. She had begun pioneering drug treatment in the US to halt the ageing process but had been in hospital with pneumonia and passed away at home, The Telegraph reported. Teenager Hayley Okines, born with Hutchinson-Gilford progeria syndrome (HGPS), was told she would never live past the age of 13 after being diagnosed with the disease but lived four years longer before breathing her last yesterday. "My baby girl has gone somewhere better. She took her last breath in my arms at 9.39 pm," her mother Kerry Okines wrote on her Facebook page. "The entire Progeria family mourns together with many as we say goodbye to Hayley Okines, our smart, beautiful and spirited English Rose, who passed away today at age 17," The Progeria Research Foundation said. Okines, a resident of Bexhill in East Sussex, has featured in a number of documentaries about her disorder and at the age of 14 published her autobiography titled 'Old Before my Time' to raise awareness about the fatal disease. Progeria disorder, which makes children age up to 10 times faster than normal, is undetectable at birth and with time results in baldness, aged-looking skin, dwarfism and a small face.