Kieren Fallon has announced his retirement from the saddle at the age of 51.
Fallon, who was crowned champion jockey on six occasions and counts 16 British Classic winners on his record, only returned to European action at the start of this season after striking up a relationship with Curragh trainer Michael O'Callaghan.
The rider had a fall on the gallops last week and O'Callaghan reports the incident to have helped Fallon come to his decision to bow out.
The handler said: "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."`
Fallon teamed up with O'Callaghan in the spring after returning from a prolonged stint in America and the pair enjoyed Group Three success with Now Or Never in the 1,000 Guineas Trial at Leopardstown in May.
The three-times Epsom Derby winner's last ride in public came on June 26, when he rode O'Callaghan's Magical Fire to finish fifth at the Curragh.
The trainer is hoping Fallon will continue to play a part in his team and hailed him as "one of the best of all time".
He said: "Kieren has been a great asset to have around the yard.
"He rode his first Group winner for a long time for us not too long ago.
"It's been great to have him here and he is going to remain here as a work rider and advisor, hopefully for a while to come - he's just giving up the race riding.
"He's had an amazing career on the track - he must be one of the best jockeys of all time.
"He is worth his weight in gold to us here, but the main thing is that we just want what is best for Kieren."