Johanna Walsh stepped up and delivered an effortless win in the Juddmonte Irish Oaks, taking the opportunity left by Thundering On's withdrawal. O'Brien still pushed a twin attack, pairing Walsh—who finished second to Earth Shot in the Ribblesdale Stakes at Royal Ascot—with the unbeaten Rebel Moon. Trained by Ballydoyle, Walsh was a 7‑2 favorite and, under Dylan Browne Mc Monagle, tracked the pacemakers before opening up two furlongs from the leader to finish four lengths clear. O'Brien praised the filly’s performance, noting Mc Monagle’s “fantastic ride watu” and the horse’s readiness for a busy autumn campaign. Thundering On’s trainer said the filly would return in the autumn, while Mc Monagle highlighted Walsh’s “unbelievable” speed and the ease of the win.

In other Curragh victories, Celeron, a 7‑2 shot, dominated the Railway Stakes, taking the lead in the last six furlongs and beating Tribeca by three lengths. Cover Up captured the Sapphire Stakes, running a British 1‑2‑3‑4 finish and earning a three‑quarter‑length victory over Rosy Affair. The day showcased Ballydoyle’s depth and the resilience of its young fillies.

These results underline Ireland’s strong form ahead of the autumn calendar, with O'Brien’s stable poised for further Group One success.