Lu Lu Laura beat her stablemate Rashette by 3 1/2 lengths in Wednesday's feature sixth race at the Gulfstream Park West meet.
Kathleen O'Connell trains both 2-YO fillies, who ran as separate betting interests. With Tyler Gaffalione riding, Lu Lu Laura won in 1:12.23 for six furlongs on the track listed as fast.
Celtic Moonlight finished third, 1 3/4 lengths behind Rashette.
Lu Lu Laura was the 8-5 favorite and Rashette was 9-1 in the six-horse field. The $2 exacta paid $47.20.
The win was the second for Lu Lu Laura in four career starts, but the race was the first time she crossed the finish line first.
On May 25 at Gulfstream, she made her debut and finished second 9 3/4 lengths behind Amapola.
Stewards placed Lu Lu Laura first after taking Amapola down for interference with other horses.
Lu Lu Laura is a daughter of Circular Quay. She was bred in Florida by Gilbert Campbell and is owned by Stonehedge Llc.