Kieren Fallon has retired from racing at the age of 51.
A six-time champion jockey, Fallon also rode 16 British Classic winners as well as two Prix de l'Arc de Triomphe titles.
The Irishman had been riding for trainer Michael O'Callaghan this year.
"He had a fall on the gallops last week and he just said he's 51 now and doesn't bounce like he used to," O'Callaghan told BBC Sport.