Champion jockey Damien Oliver had to call on all his skills to get Princess Jenni home in the Gr.1 Australasian Oaks (2000m) at Morphettville in Adelaide.
Trained at Mornington in Victoria by David Brideoake, the filly found herself in traffic more than once but Oliver was patient and steered her through a gap late in Saturday's Group One test.
Sent out at the $3.30 favourite, Princess Jenni beat Mirette by three-quarters of a length with the John Sargent-trained House Of Cartier close-up third.
Brideoake's racing manager Alex Woodhams was on hand and admitted to some nerves but had faith in the jockey.
"You put Ollie on and he produces something special most of the time," Woodhams told broadcaster racing.com.
"She has a great turn of foot and sprinted when the gap came."
Oliver said he had not been too worried during the race which was delayed several minutes when one of the on-course ambulances broke down.
"She's a good filly and she's been in great form," Oliver said.
"I was able to utilise the barrier (2).
"I got a little bit hemmed in coming to the turn but was able to follow some good horses through.
"I went to edge out then looked back inside and saw Dwayne Dunn go that way so I ducked back and got through there."
Winning owners Tony and Lynn Ottobre were on hand to celebrate the victory and honour their late daughter Jenni, who succumbed to brain cancer in 2015 and whom all of their horses are named after.
A graduate of the 2017 New Zealand Bloodstock Premier Yearling Sale, Princess Jenni was a $120,000 purchase from the draft of Phoenix Park, who presented her on behalf of breeders Marg and Murray Hardy of the Sunlight Trust. -AAP
"It's been a hell of a ride for us, she's named after our daughter who passed away and we're keeping her name alive."— Racing.com (@Racing) May 4, 2019
After Princess Jenni's amazing victory in the Schweppes Oaks an emotional Tony and Lynn Ottobre explain just how much this moment means to them. pic.twitter.com/5MSOetEzii