Chriselliam, a 28-1 outsider part-owned by former jockey Willie Carson, won the Fillies' Mile at Newmarket.
Champion jockey Richard Hughes rode the Charlie Hills-trained daughter of Iffraaj to beat favourite Rizeena by a length, with Ihtimal third.
Earlier, 13-8 favourite Soft Falling Rain was an impressive winner of the Joel Stakes for trainer Mike de Kock.
Miss France, a rare Newmarket runner for French handler Andre Fabre, took the opening Oh So Sharp Stakes.
Carson had indicated before the mile-contest that the filly he owns with two others was an unlucky runner-up at Haydock last time.
She came from back in the field to pass Clive Brittain's Moyglare Stud Stakes winner Rizeena and earn a quote of 14-1 for next year's 1,000 Guineas back at Newmarket.
"She's an ideal Guineas candidate" said Hughes, who won the Classic in May on Sky Lantern and was ending a run of 35 rides without a winner.
Before then, Hills - enjoying his first Group One winner in Britain - indicated the filly may run at the Breeders' Cup meeting in California in November.