Curvy and Covert Love are significant additions to the field for Saturday's Darley Irish Oaks at the Curragh.
The David Wachman-trained Curvy clinched her fourth victory of the campaign in the Ribblesdale Stakes at Royal Ascot last month and has been supplemented for this weekend's Classic.
Covert Love, trained by Newmarket handler Hugo Palmer, is also unbeaten in 2015 and connections have stumped up the cash to add her to the line-up following an impressive victory in the Hoppings Stakes at Newcastle.
Aidan O'Brien has saddled four previous Irish Oaks winners, including last year's heroine Bracelet.
The master of Ballydoyle has seven fillies among the 16 confirmed, including Epsom Oaks winner Qualify, Together Forever and Words.
O'Brien will wait until later in the week before finalising his team.
The trainer said: "It will all depend on how they are working and what way the ground will be - there is a little bit of rain hanging around - some of them would like it nice and some of them would like it on the soft side.
"A mile and a half should suit Together Forever well, Qualify is a possible depending on ground and work and Words is a filly that has only had two runs, she won her Group Three at Cork nicely."
O'Brien's Diamondsandrubies was a significant absentee and is expected to be seen next in the Qatar Nassau Stakes at Goodwood.
Ralph Beckett's Forte, the John Gosden-trained Gretchen and Speedy Boarding from James Fanshawe's yard could all join Covert Love on the trip from Britain.
Other possibles for the home team include Jessica Harrington's Jack Naylor and Jim Bolger's Pleascach.
