Owner McManus is hoping to rock Down Royal with Galway Plate triumph
Down Royal General Manager Mike Todd is anticipating two days of fantastic racing at the Summer Festival tomorrow and Saturday.
"I expect a maximum turnout with the current weather," said Todd.
"Friday provides high-class jumps action with the Tote Galway Plate trial the feature, while the Magners Ulster Derby is Saturday's highlight and is the most prestigious and valuable flat race run in the province."
Chanelle McCoy, wife of multiple Champion jockey AP McCoy, will oversee and judge the Best Dressed Lady competition.
Rock The World, trained by Jessica Harrington, is the current top weight for the Galway Plate tomorrow.
Rock The World is one of a pair of entries owned by JP McManus, while Ryanair boss Michael O'Leary has a total of eight engaged under his Gigginstown Stud banner.
Henry de Bromhead, who has claimed the last two renewals for McManus with Elegant Statesman, is due to be represented by Devils Bride - one of the Gigginstown contingent.
Order Of St George - the winner of Her Majesty's Plate at Down Royal in 2015 prior to landing the Ascot Gold Cup in 2016 - bids for another victory today with Ryan Moore aboard the Aidan O'Brien runner.
The trainer said: "Everything has been well with him - so far so good."
The Ballydoyle trainer has six engaged in the £100,000 Magners Ulster Derby with Finn McCool and Utah topping the weights.
Trainer Jim Bolger, who has claimed two of the last three runnings of the Ulster Derby, has the Godolphin-owned Clongownes engaged. The colt is still a maiden and has finished runner-up in his four starts this year.
Meanwhile, trainer Karl Burke will try to fend off the might of Wesley Ward when Havana Grey runs in the Norfolk Stakes at Royal Ascot tomorrow.
A Listed winner at Sandown on his third start, he has already shown he has plenty of speed - and experience.
However, Havana Grey could be expected to be a much shorter price were it not for the presence of the Ward-trained McErin.
The big race of the day is the Britannia Stakes, with the market headed by Richard Hannon's Son Of The Stars, who will be ridden by Oisin Murphy.
Mirage Dancer is likely to be a warm order for the Group Three Hampton Court Stakes over a mile and a quarter.
The son of Frankel, trained by Sir Michael Stoute, won on his debut at Doncaster last autumn and made some eye-catching late headway to take fourth place in the Dee Stakes at Chester in May.