Flyefit is to open a new gym in the Jervis Shopping Centre.
It'll take up 18,100 sq. ft. of space on the first-floor and first-floor upper, beside Golden Discs.
Property firm Savills says the gym will open "in the coming weeks."
The Jervis Shopping Centre has reported an annual footfall of 14.1 million.
It's also recently attracted the biggest JD Sports outlet in Ireland, and is also home to the biggest New Look in Europe.
Flyefit has 15 facilities across Dublin and Cork.
