Dermot Weld-trained Mustajeeb, winner of the Jersey Stakes at last year's Royal meeting, heads the Irish team for the Diamond Jubilee Stakes at Royal Ascot on Saturday, following a recent triumph in the Greenlands Stakes at the Curragh.
Also travelling are Aidan O'Brien's Due Diligence, the Sabrina Harty-trained Ansgar, Eddie Lynam's Moviesta and Tom Hogan's stable star Gordon Lord Byron.
Australian challengers Brazen Beau and Wandjina head a field of 15 runners.
Choisir was the first horse to take the Group One prize Down Under in 2003 and the brilliant mare Black Caviar repeated the trick in 2012.
Chris Waller's Brazen Beau heads the betting for this year's renewal having won at the top level on multiple occasions in his homeland, while Wandjina is another major contender for leading Australian trainer Gai Waterhouse.
Wesley Ward's American hope Undrafted is another big hope from overseas.
One of the main hopes for Britain is Dean Ivory's Tropics, while the only horse backing up quickly after running in the King's Stand is David Barron's Pearl Secret, who was fourth on Tuesday.
