A daughter of Frankel out of Group One winner Proportional, there was a good word for Dermot Weld's youngster beforehand and she was sent off the 9-4 favourite in the hands of Pat Smullen.
She showed off impressive acceleration to sweep to the front inside the final quarter-mile and ran right the way to the line to keep another debutant, Awtaad's half-sister Alghabrah, a length and three-quarters at bay.
Weld said: "She's a very talented filly, with a lot of potential, and next spring we'll decide which way we go with her. My immediate reaction was she's more of an Oaks filly, but we'll see what the spring brings.
"She just could be very good, and it takes a good filly to win from stall 18. She has a lot of class and is a lovely big staying filly. She also has plenty of pace."
Of another potential star for Frankel, Weld added: "It was great to see Cracksman win for Frankel yesterday and hopefully this filly won't let him down next year."
Smullen said: "She's a proper filly, she overcame a lot there. I thought it was a very good performance for a filly first time out and there's a lot to look forward to next year."