Kingston Hill lived up to his billing as pre-race favourite by winning the St Leger at Doncaster on Saturday.
The three-year-old colt came late in the final stages, and managed to hold off the challenge of Romsdal, who finished second.
Snow Sky finished third, while there was drama before the race as Odeon was forced to withdraw after coming to the start line wearing undeclared headgear.
Following a stewards' inquiry looking into interference between the leading trio, it was confirmed that the result would stand and winning jockey Andrea Atzeni was ecstatic with the triumph.
"I don't know what to say, it's a dream really. It's unbelievable," he said.
"I rode him like the best horse in the race, he travelled beautifully. He's so laid-back, he goes to sleep.
"When I pulled him out he was always going to get there. He was just wandering about when he hit the front.
"To be honest with you, I wanted to sit a little bit closer than I did, but I went out there thinking he was the best horse in the race and that's how I wanted to ride him.
"I'm so lucky. Everything has just happened so quickly for me, I'm just so, so lucky. You need the horse. I had the horse today."
Trainer Roger Varian also waxed lyrical about the horse, before suggesting that Kingston Hill would run in next month's Prix de l'Arc de Triomphe.
"I'm just so pleased for the horse, that he'll get the credit he deserves, and for the owner, who is a great man," he said.
"This horse deserved to win a classic and he's done so.
"He looked a classic horse at the start of the year and he's won a classic.
"I think the long nights and the dew have helped with the ground and also today being overcast, but I think it was quicker than ideal for him.
"First we have to get him home and see if he comes out of the race okay. He's not had a busy summer. Hopefully he's not finished this year.
"We'd have to consider the Arc if he came out of this okay. He's had a hard race today. He's got out to come of it well and we have to make sure he's 100 per cent."