Gardaí say there was little trouble last night at the Oxegen music festival in Punchestown.
Around 80,000 people are expected to attend the event over the course of the weekend.
Gardaí are advising people travelling today to use the park and ride facility at Goffs on the N7.
Black Eyed Peas and Florence and the Machine are just two of the big name acts due to take to the stage today.