Her name was Hayley Okines and she was born on Dec 3, 1997. She was the author of Old Before My Time: Hayley Okines’ life with progeria.
A 17-year-old who suffered from a rare genetic condition that left her with the body of an elderly woman died on April 2,2015. Hayley Okines had progeria, which meant that as a child, her body aged at a rapid rate — eight times faster than the average person. She was known as Britain’s 100-year-old teenager. The Telegraph reported that Okines, who had sought treatment in the United States, had “the body of a 104-year-old.” According to the BBC, Okines had been hospitalized recently, but had gone home before her death.
Source: Washington Post