Forbidden Fruit have added six extra acts to play at the festival.
Moderat, Maceo Plex, Motor City Drum Ensemble, NAO, KiNK and Mall Grab have all been added to the bill.
The third and final headliner was announced this week.
Aphex Twin will headline the main stage on Sunday night.
Also headlining that weekend is Orbital on Saturday, and Bon Iver is closing the festival on Monday night.
Forbidden Fruit takes place in Royal Hospital Kilmainham on the Bank Holiday weekend 3rd-5th June.