Hillstar is a top priced 12/1 with William Hill having been supplemented for the King George VI And Queen Elizabeth Stakes at Ascot on Saturday.
Sir Michael Stoute’s three-year-old claimed the King Edward VII Stakes at Royal Ascot last month and owner Sir Evelyn de Rothschild has paid £75,000 to add him to the field.
Stoute is bidding for a record sixth King George triumph.
Aidan O’Brien’s St Nicholas Abbey (9/4) is currently edging favoruitism for the race over French raider Cirrus Des Aiglas.