Noel Fehily will partner Kitten Rock in the Stan James Champion Hurdle at the Cheltenham Festival next Tuesday.
Mark Walsh steered the JP McManus-owned five-year-old to a hat-trick of victories this season, but the jockey suffered a broken arm in a fall at Thurles last week.
Fehily's agent Chris Broad said: "Noel's been booked to ride him. There are only eight runners in the race and he's a nice ride to get."
Kitten Rock was a runaway winner of the Red Mills Trial Hurdle at Gowran Park last month, but will be a big outsider for the main event on the opening day.
Trainer Edward O'Grady said: "The plan is to run and he seems in very good form.
I have backed him to replace AP