The Tommy Stack-trained filly was given the go-ahead to take on the colts following a workout this morning.
Both her wins have been over the six-furlong track at the Curragh course, her latest success coming in the Group Three Anglesey Stakes earlier this month.
“She’s not done much since she ran the last day, but she did a little bit of work this morning and seems OK,” said Stack’s son and assistant Fozzy.
“We’ll see how she gets on taking on the boys again on Sunday.”
Walk On Bye is one of 12 possibles for the Group One contest at the latest entry stage with Aidan O’Brien predictably mob-handed.
The Ballydoyle maestro has left in Air Chief Marshal, Alfred Nobel, Beethoven, Lillie Langtry and Reggae Dancer as he searches a remarkable 10th success in the last 12 runnings.
Brian Meehan’s hugely impressive Norfolk Stakes winner Radiohead is the sole challenger from Britain, while Jim Bolger could be represented by Gold Bubbles.
Dream Deer, In Some Respect, King Ledley and Rock Jock complete the field.
Phoenix Stakes: Cashmans bet - 2 Walk On Bye, 5/2 Alfred Nobel, 11/4 Radiohead, 12 In Some Respect, King Ledley, 14 Gold Bubbles, 33 Air Chief Marshal, 66 Dream Deer, 100 Rock Jock
SP/DR: Beethoven, Lillie Langtry and Reggae Dancer