Casamento has been supplemented for the Juddmonte Beresford Stakes at the Curragh on Sunday.
Connections of the Michael Halford-trained Shamardal colt were happy to approve the 10,000 euros fee to put the two-year-old in the Group Two contest following his fine effort in the National Stakes at the Curragh.
As short as 12-1 for the 2000 Guineas, the Sheikh Mohammed-owned youngster was touched off by the more experienced Pathfork on what was just his second career start, having won a Tipperary maiden the previous week.
"He's been in great form since his run in the National Stakes. He worked well this morning so we decided to supplement him," said County Kildare handler Halford.
"This could possibly be his last race of the season. It would be a decision we'd make after Sunday. We're very pleased with him, but we'll take one race at a time."
The mile event has a rich recent history, with Alamshar, Azamour, Septimus, Sea The Stars and St Nicholas Abbey all on the roll of honour since 2000.
Eight of the 15 horses confirmed at the five-day stage are trained by Aidan O'Brien - Eskimo, Factum, Long Live The King, Master Of Hounds, Robin Hood, Samuel Morse, Seville and Treasure Beach.
Kevin Prendergast has two possibles in Longhunter and Mawaakef, while Jim Bolger is double-handed with Gleadhradh and Music In The Rain. The entries are completed by John Murphy's Hold The Aces and Ted Walsh's Rossvoss.