Royal Diamond has been confirmed as an intended runner in Sunday's GAIN Irish St Leger at the Curragh.
The seven-year-old won the Group One event last season but connections had been considering skipping the one-mile-six-furlong event in favour of a crack at the Caulfield Cup in Australia next month.
However, owner Andrew Tinkler has confirmed a defence of his Curragh title is now the plan.
He tweeted: "Royal Diamond to take his chance to try and win back to back GAIN Irish St Leger on Sunday."
Royal Diamond, who is trained by Johnny Murtagh, was last seen winning the trial event for the Irish Leger last month.