The winner of the Australian Oaks in the autumn, Unforgotten started the $3.80 favourite in Saturday's Group Two Chelmsford (1600m) at Randwick off the back of an eye-catching sixth behind her illustrious stablemate in the Winx Stakes.
Unforgotten swooped from back in the field in the Chelmsford to beat Ace High ($21) by 1-1/4 lengths with the winner's stablemate, stayer Libran ($41) another short half head third.
“She is very special,” Waller said.
“She showed that in the autumn and the Oaks was very special in itself. That was great at the mile.”
Waller said there were many options for Unforgotten including the Caulfield Cup.
“We'll see where she fits in and where the weights settle.
“I could have gone Epsom and Cox Plate with her bar for Winx. That is what we did with Winx and that was the making of her career.
“She won't be taking on Winx I can tell you that.”
Hugh Bowman, who rides Winx, said Unforgotten had star quality.
“She just looks magnificent,” he said.
“It's lovely to be back on her. Obviously she raced against Winx a couple weeks ago and it was a real eye-catcher over a distance that was too short.
“I was feeling better at the furlong (200m) than I was the 300 metres.
“I ran into a bunch of horses that were at their top but I had the horse to take me places I wouldn't go on many.
“She is pretty smart and she put the writing on the wall when she won the Oaks here in the autumn.
“The world is her oyster. I wouldn't imagine she would be beating Winx anytime soon but there are plenty of nice races for her.”
Ace High gave his connections a boost when he redeemed himself after finishing last of 11 runners in the Winx Stakes at the beginning of his campaign.
“That was much better and I'm very happy,” he said.
“We couldn't find anything wrong with him after the Winx Stakes but when I analysed the sectional times the pace of the race was against him.”