The Aidan O'Brien-trained Virginia Waters has been supplemented at a cost of £20,000 for Friday's Epsom Oaks.
Virginia Waters was an impressive winner of the 1,000 Guineas
The 1,000 Guineas winner is one of two additions to the Epsom Classic, with Godolphin including Fen Shui.
O'Brien had indicated earlier in the week he would supplement Virginia Waters if the ground looked like it may ride on the quick side.
It means a maximum of 13 runners will go to post for Friday's mile-and-a-half feature race.
Virginia Waters finished eighth last weekend on softer conditions in the Irish 1,000 Guineas.
She is one of three O'Brien-trained horses in the field, with Mona Lisa and Silk And Scarlet also set to line-up
The lightly-raced Fen Shui finished 10th in the Newmarket Guineas on her only start this season.
Frances Crowley's Irish 1,000 Guineas winner Saoire is an absentee, with Jim Bolger's Pictavia and Dermot Weld's Dream To Dress completing the Irish challenge while the Elie Lellouche-trained Argentina represents France.
Ante-post favourite Eswarah, trained in Newmarket by Michael Jarvis, leads the home defence while Lingfield Oaks trial victor Cassydora has also stood her ground along with David Elsworth's Lupe Stakes winner Something Exciting.
Mick Channon's Joint Aspiration, the Michael Bell-trained Higher Love and Brian Meehan's Magical Romance complete the field.