Later that month she started at odds of 12/1 for a similar event at Galway and recorded her first success, staying on well in the final furlong to win by half a length from Tamadhor.

Racing on very soft ground she never looked likely to win and finished fourth of the eight runners behind the Dermot Weld-trained Stormfly, beaten 5+1⁄2 lengths by the winner.

After racing towards the rear of the five-runner field, she moved forward in the straight, took the lead a furlong and a half from the finish, and drew away in the closing stages to win by three and three quarter lengths from Wedding Vow.

[7] On 3 May 2015, Legatissimo, ridden for the first time by Ryan Moore was one of thirteen fillies to contest the 202nd running of the 1000 Guineas over the Rowley Mile course at Newmarket.

[8] On 5 June, Legatissimo was moved up in distance and started 5/2 favourite for the 237th running of the Oaks Stakes over 1+1⁄2 miles at Epsom Downs Racecourse.

After turning into the straight in seventh place she looked unlikely to obtain a clear run but Moore forced her through the field to take the lead approaching the final furlong.

[9] At the end of the month she was matched against older fillies and mares and started 6/4 favourite for the Group One Pretty Polly Stakes at the Curragh.

After racing in mid-division, Legatissimo moved up on the outside entering the straight, took the lead approaching the final furlong and accelerated clear of the field to win by two and a quarter lengths from Wedding Vow.

Arabian Queen finished third ahead of Cladocera, Jazzi Top and Lady of Dubai, all three of whom encountered interference in the final quarter mile.

[11] Legatissimo ended her season with a trip to the United States for the Breeders' Cup Filly and Mare Turf over 9+1⁄2 furlongs at Keeneland on 31 October.