Irish Derby: Outsider Sovereign beats Anthony Van Dyck at the Curragh
Long-shot Sovereign led from start to finish to win the Irish Derby and beat Epsom victor and stablemate Anthony Van Dyck into second at the Curragh.
The 33-1 outsider left the 5-4 favourite with too much to do after Padraig Beggy set a blistering pace to win by six lengths.
Aidan O'Brien trains the top three with Norway (16-1) coming in third.
Anthony Van Dyck was aiming to become the 19th horse to complete the Derby double.
It was a major upset and the stands almost fell silent as Sovereign crossed the line ahead Anthony Van Dyck to give O'Brien his 13th Irish Derby success.
Sovereign was expected to be one of the lesser lights of O'Brien's five runners and made the running with stablemate Norway.
Broome, one of O'Brien's better-fancied contenders, was slowly away and the two pacesetters soon built up a big lead.
The pair were eight lengths clear with four furlongs to go and did not come back to the field as might have been expected, with Sovereign, who was only 10th at Epsom, keeping up the gallop and never looking like being caught.
Anthony Van Dyck was two and a half lengths ahead of third-placed Norway, with Madhmoon just behind in fourth.
Ladbrokes slashed the price of Sovereign in half for the St Leger, going 10-1 for the Doncaster Classic.
"The winner is a staying horse and he's going to stay well - he won't mind going the Leger trip," said O'Brien
"He could go to the King George or go to the Grand Prix de Paris in France and then could have a break and go to the Leger.
"He's a solid horse and very uncomplicated. Padraig gave him a great ride. Ryan's horse [Anthony Van Dyck] ran very well. He was the only horse to chase after him [Sovereign], but probably Padraig was gone at the time.
"I thought he ran very well. We were going to decide with him after this whether we go to the Grand Prix de Paris or the King George."
Cornelius Lysaght, BBC horse racing correspondent
When it comes to horses that are part of the Coolmore racing empire, trained by Aidan O'Brien, we think more of business than of romance, but this win is the latest chapter in the astonishing fairytale of Padraig Beggy.
In danger of being down and out prior to the Epsom success of Wings Of Eagles, Beggy hasn't had all that many rides, let alone winners, since then.
But, like a slightly potty story-line in a trashy movie, he's pulled it off again; the tactics employed on some of his rivals who never managed to peg back the all-the-way winner will be long discussed.