Aiden O’Brien’s colt had already picked up victories in the 2000 Guineas at Newmarket and Derby at Epsom and eventually took the win by two lengths after initially struggling in the heavy conditions.
“We really felt it wasn't the right thing (to run on this ground) but he's a great horse,” said Aiden O'Brien, who know has seven successive wins in the Irish Derby.
“He's a real fast ground horse. We appreciate all the hard work everyone's put in, the sponsors, the Curragh - I can't say how thrilled we are to be part of it.
“It doesn't get any better than this. These are days you can't dream of. I never would have believed it could ever happen.
“He's by far the best we've had - we've never had anything like this.
“He had the speed to win the Guineas, the class to win the Derby and then he had to have class, courage and stamina to win today.
“Obviously the lads will speak about the Triple Crown now, wouldn't it be something to dream about?”
The final leg of the Triple Crown is at Doncaster.