James Fanshawe, who won the Duke of Cambridge Stakes with Soviet Song in 2006 and Spacious in 2009, is targeting further success after supplementing the lightly raced Tribute Act for the Group 2 on Wednesday
Tribute Act finished second to Urban Fox, who is due to reoppose, over the same course and distance in May, and will be stepping up in class, but Di Fede, who finished third, boosted the form by winning at Leicester this month.
Owners Elite Racing Club, who have added her at a cost of £15,000, know Tribute Act's pedigree well. She is a sister to Ribbons who won the Prix Jean Romanet in 2014 in the same colours, and her dam Sister Act was a sister to five-time Group 1 winner Soviet Song.
Fanshawe said: "We've stuck our neck on the line supplementing her but she has always shown plenty at home.
"She won twice last summer but she wasn't quite right after that. She ran well at Ascot last time, the race is a good stepping stone – Ribbons got beat in it before winning a Group 1 – and she's come out of it in good shape.
"It's a race over a mile for fillies aged four and older and there aren't many of those around so we thought we'd give it a go."
Fanshawe's only other Royal Ascot representative will be stable star The Tin Man, who will be defending his crown in the Diamond Jubilee Stakes on Saturday.
The six-year-old, who tends to run his best races at Ascot, is the flagbearer for Pegasus Stables and he made a winning return to action at Windsor last time.
His trainer said: "The Tin Man was very sick in Hong Kong and he had an enforced holiday. The team did a wonderful job to get him back and he won the Leisure Stakes well.
He added: "D'Bai, who finished second, has since come out and won the John of Gaunt Stakes, so that shows you it wasn't an easy race."
Ground and weather update
The ground at Ascot is currently good to firm, good in places. Clerk of the course Chris Stickels said on Thursday: "We're going to water tomorrow. The forecast is generally dry, the only possibility of rain is on Saturday and that could be anything from one to five millimetres."
He added: "I anticipate we'll be racing on similar ground to what we have now."