Crowds have been arriving at Electric Picnic for the start of the three-day festival.
70,000 people are expected to attend the event at Stradbally Hall in Laois.
All campsites are now open and action on the main stage today kicks off at 6pm this evening.
Headliners include Niall Horan and Billie Eilish this evening, as well as Paolo Nutini, Fred Again, The Script and The Killers across the weekend.