Former England player and assistant coach Graham Thorpe has been admitted to hospital due to serious illness, the country's players' union said on Tuesday.
The 52-year-old Thorpe left his role in England's coaching staff after the Ashes in January and has since accepted the job as head coach of Afghanistan.
"Graham Thorpe has recently fallen seriously ill and is currently in hospital receiving treatment," read a statement issued by the Professional Cricketers' Association at the request of his family.
"His prognosis is unclear at this stage and we ask for privacy for him and his family at this time. Our thoughts are with Graham and his family."
Thorpe, a stylish left-handed batter, scored 6,744 Test runs for England, including 16 centuries, at an average of 44.66.
He scored an unbeaten 114 in the second innings of his Test debut against Australia and had a Test best of 200 not out, made against New Zealand in 2002.
After retiring in 2005 Thorpe began coaching in Australia, working with New South Wales before returning to England.
He was an assistant coach for the men's team under Trevor Bayliss and Chris Silverwood.
After retiring in 2005 Thorpe began coaching in Australia, working with New South Wales before returning to England.
He worked as an assistant coach with England alongside Trevor Bayliss and Chris Silverwood, and oversaw England in the Ashes Test at Sydney last year after Silverwood contracted coronavirus.
Surrey, the club where Thorpe spent his entire 17-year first-class career, said: "The thoughts of everyone at the Club are with Graham, his wife Amanda, and family at this time.
"He is an icon of the English game, known by millions of cricket fans and forever a favourite son of Surrey CCC."
Former Surrey left-hander Thorpe was renowned as one of the finest English players of his generation, played exactly 100 Tests and scoring 16 centuries before retiring in 2005.
He went on to begin a coaching career in Australia, where he worked with the likes of Steve Smith and David Warner at New South Wales, before joining the England and Wales Cricket Board as a batting coach.