Michael Dunlop has been added to this weekend's big Sunflower Trophy meeting at Bishopscourt.
It has been confirmed that Dunlop will be part of the McAdoo Racing team on Friday and Saturday.
The Ballymoney rider replaces Derek Sheils who has was forced to withdraw because of illness.
Read more: Emotional Dunlop celebrates 21st TT win after Supersport masterclass
Dunlop - a 21-time Isle of Man TT winner - will join Eunan McGlinchey in the McAdoo Kawasaki set-up and compete in the Superbike and Supersport races.
Other riders heading to Bishopscourt this weekend include Ulster Superbike champion Alastair Seeley, Richard Cooper and emerging talent Korie McGreevy.
Ian Hutchinson and Jeremy McWilliams will feature in the ultra-competitive Supersport class.
Admission for this weekend's racing is £25 with Under 16 going free.
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