Estrange gained her first group 1 victory with smooth success in the Pretty Polly Stakes (G1) at the Curragh June 27.
Danny Tudhope's mount, owned by Cheveley Park Stud, traveled up well on the outside in the straight and asserted herself approaching the final furlong for a convincing success.
Epsom Oaks (G1) winner Thundering On looked to be making a serious challenge in the final 2 furlongs, but her effort petered out and she weakened into fourth late on.
Estrange finished second to Minnie Hauk in the 2025 Yorkshire Oaks (G1), and Kalpana in the 2025 Fillies and Mares Stakes (G1) on Champions day in her two attempts at the group 1 level last year.
Estrange was cut to 12-1 for the Prix de l'Arc de Triomphe (G1) by Ladbrokes, who were 33-1 about her chances June 26. She missed the race last year after being withdrawn late because of scoping dirty. The same firm has lengthened Thundering On's odds to 20-1 (from 7).
Tudhope said on Racing TV: "I thought dropping back in trip would suit her and she has a lot of speed. She felt good and picked up well when I asked her and put the race to bed.
"Hopefully the Arc will be a target for her again. It would be a dream to go for it, so why not?"
Wathnan Racing's One Look was 1 1/2 lengths back in second, with Juddmonte's Red Letter a half a length farther back in third.
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