As a $20,000 yearling, Better Reflection will have underdog status against a field in which the average price will be about $200,000.
Wigginton's previous best win was in the Eye Liner Stakes with Nessuno and Seymour has ridden about 12 feature winners across Australia in two decades of riding.
Wigginton said Better Reflection had continued to improve after not showing much when she first came into the stable.
The filly trialled well before her debut when she won a 1050m race on her home track by almost six lengths in November which prompted the trip to Doomben.
“In the Calaway Gal she did surprise me when she sat three-deep and won so well,” Wigginton said.
He decided to bring Better Reflection to the Gold Coast last Wednesday and Seymour made the trip with them.
“It took about eight hours but she seems fine,” he said.
Seymour got a look at the Gold Coast track on Saturday when he rode unplaced All Eez for Wiggington in the last race.