Cachet made all in the Qipco 1000 Guineas at Newmarket to give trainer George Boughey his first Classic success.
Remarkably, it was a second Classic of the weekend for rider James Doyle - just 24 hours on from his maiden one aboard Coroebus in the 2000 Guineas.
Winner of the Nell Gwyn at the Craven meeting, the Highclere-owned daughter of Aclaim was sent off a 16-1 but led from the stalls opening and was never passed, despite the strong late challenge provided by the Ralph Beckett-trained Prosperous Voyage.
Try as she might, the latter could not get there, as Cachet answered every call to prevail by a neck, with Tuesday another length and three-quarters back in third for Aidan O'Brien and Frankie Dettori.