Taghrooda produced a stunning display to win the King George by three lengths ahead of favourite Telescope at Ascot at the weekend.
The 7-2 chance came through with a surging run in the final furlong to beat Sir Michael Stoute’s four-year-old colt with Mukhadram in third.
Jockey Paul Hannagan kept his mount at the rear from the start and settled in just behind Trading Leather in the 1m 4f clash.
With a slow pace set, Leitir Mor went out in front while Mukhadram, the Coral Eclipse winner, sat in second approaching the seven furlong pole.
In the straight, Hanagan pulled out wide as Telescope and Mukhadram challenged for the lead approaching the two furlong pole.
Taghrooda eventually chased them down in the final furlong and took the lead before powering away from her rivals up the hill.
She becomes the first filly since 1976 to win the Oaks and King George in the same season.