The concert takes place on Saturday July 16, and has already sold out.
He will join The Coral and Stephen Fretwell on the list of support acts.
Stage times for the gig have also been confirmed.
Stephen Fretwell will take to the stage first, at 4.50pm.
He will be followed by Mundy, who will begin his set at 5.50pm.
The Coral will play at 7.10pm, while the headline act will hit the stage at 8.45pm.
Mundy is also due to play at the Dancing With Lunasa Festival, in the grounds of Offaly’s Kinnitty Castle, on July 31.