The Queen Mary Stakes winner, who was ridden to big race victory by Oisin Murphy, will now run in the Group Two Prix Robert Papin at Maisons-Laffitte on Sunday.
“We have declared her for the Prix Robert Papin on Sunday at Maisons-Laffitte,” said the Settrington trainer.
“The main reason is down the line after racing, she’s going to be bred from and she’s got a very nice pedigree.
“She’s already a Queen Mary winner and we just decided that this was the route – the Group route – that we’d follow with her, so that’s where we are.”
Signora Cabello, who was also victorious at York’s Dante meeting in May under Jason Hart, is set to be joined on the trip across the Channel by the Karl Burke-trained True Mason.
The youngster opened his account at the third attempt at Nottingham last month and Burke feels his charge is ready for a step up in class.
“On paper it’s a big step up, but we feel he’s a very nice colt,” said the Leyburn-based trainer.
“If he gets there in the same sort of form he’s in now he’ll run a big race.”
Meanwhile, Mildenberger has next month’s Qatar Gordon Stakes at Goodwood as a comeback target before a crack at the St Leger in September.
The Mark Johnston-trained colt has been out of action since finishing second to subsequent Coral-Eclipse winner Roaring Lion in York’s Dante Stakes.
He was being aimed at the King Edward VII Stakes at Royal Ascot, but was found to be lame in the days leading up to that meeting and the same issue kept him out of an option in France last weekend.
“He was lame the Sunday before Ascot which was hugely frustrating,” said the trainer’s son and assistant Charlie. “We hoped for him to be running in the Grand Prix de Paris and we had to draft Dee Ex Bee in to fill his shoes
“The target at the moment is the Gordon Stakes at Goodwood. There is not a huge amount else for him in that time frame.
“The Gordon then looking towards the St Leger will be the plan.”