Jonny Murtagh produced a masterful ride on Dancing Rain to stun the field and win the Oaks at Epsom on Friday.
Dancing Rain set the pace and kept finding extra reserves of energy to finish with a flourish ahead of Wonder of Wonders ridden by Kieren Fallon.
Pre-race favourite Blue Bunting ridden by Franke Dettori was a disappointing fourth pipped at the post by Izzi Top.
Earlier favourite St Nicholas Abbey, trained by Aidan O'Brien and ridden by Ryan Moore, won the Coronation Cup.
In what was a slowly run Oaks, those horses ridden with restraint failed to get involved in the mile-and-a-half contest.
Blue Bunting was settled in the middle of the pack for much of the race but was unable to pick up sufficiently to trouble the leaders.
Dettori was later called in by the stewards for dropping his hands on Blue Bunting having seemingly had third place sewn up inside the final furlong.
He was handed a 10-day suspension [17-26 June inclusive] meaning he will miss the final two days of Royal Ascot, most notably the ride on Delegator in Golden Jubilee Stakes.
He will also sit out the following week, including the Irish Derby meeting.
The previously unbeaten Zain Al Boldan did her chances no favours by failing to settle, while Havant, strongly fancied to build on her sixth-placed finish in the 2000 Guineas, was a never-nearer 10th.
"I spoke to [owner] William [Haggas] and I said I think I'll make the running," a delighted Murtagh told BBC Sport.
"I watched the videos of her races and she seems to travel very well and is uncomplicated.
"We set a nice pace but she was ducking and diving, so I knew there was loads left in the tank.
"I picked her up in the last half-mile and it worked really well for her.
"I knew Group Ones were going to be hard to come by this year.
"William rang me up for the ride and I was delighted to take it. You need to be in the big races and you need to be on a good one."
"I'm thrilled to bits," Haggas added after the 20-1 shot's victory.
Mrs Haggas, the daughter of legendary jockey Lester Piggott, is sporting a cast on the leg she broke giving Dancing Rain a stalls prep.
She said: "It was just one of those silly accidents, It wasn`t her fault, but unfortunately I broke my fibula so having ridden her all winter, I haven`t been able to ride her all week.
"It's been extremely frustrating, but one of the other girls in the yard, Rosie, has ridden and she has done a brilliant job. It's been a big team effort.
"I always thought she would stay and come round the track as she is so beautifully balanced. She got beaten at Newbury but she probably should have won.
"I thought she would improve for a trip and it looked such an open race. In a normal year on what she`d done so far you might not have run, but we thought we may as well have a go."
In the Coronation Cup, it was Midday who made the early break and looked to have the race won before St Nicholas Abbey's stamina shone through.
Clowance also produced a fine run, in what could be her last race, with Dandino fourth and Indian Days fifth.
"It was a slowly run race and I think he was happy with the way it unfurled. He has a big heart," said O'Brien.