Five runners, headed by Epsom Derby winner Australia, will contest the Irish Derby after Kingston Hill and Geoffrey Chaucer were withdrawn.
Derby second Kingston Hill and Australia stablemate Geoffrey Chaucer, were taken out of the 17:30 BST race because of the good to firm going.
Aidan O'Brien, seeking an 11th Irish Derby win, has three runners including the favourite Australia.
He says the son of Galileo is the best horse he has trained.
Kingfisher (10th in the Derby) and Orchestra (12th) are also set to run for O'Brien.
Fascinating Rock, eighth in the Derby at Epsom on 7 June, represents Dermot Weld while fellow local trainer John Oxx saddles Ponfeigh.
Australia will again be ridden by the trainer's son Joseph, who said: "He travelled great and did everything well at Epsom. I'm really looking forward to it."