Four year-old Pirapala started her career in Sydney with Gerald Ryan placing twice at Wyong and Warwick Farm last year.
She had one unplaced run at Randwick in February and was subsequently transferred to the Hayes Dabernig training partnership.
Sent out a short priced favourite at Tatura, Pirapala powered to the line from back in the field to win the 1100 metre maiden by two and a half lengths.
An $850,000 Magic Millions purchase for China Horse Club from the Mill Park draft, Pirapala is the first winner for stakes-winning Starcraft mare Celebrity Girl, a half-sister to the dam of Group III winner Generalife and daughter of stakes-winner Dashing Granada.
Mill Park sold an I Am Invincible colt from Celebrity Girl at Magic Millions this year for $300,000 to Sun Bloodstock and she was covered last spring by Not a Single Doubt.
Pirapala is the 22nd Australian winner of the season for Sepoy, who is currently the leading Australian Third Crop sire by earnings ahead of Smart Missile and Foxwedge.
The Golden Slipper winner stands at Darley at a fee of $16,500.