Early ticket holders will have access to the site from Thursday.
Mary McAleese will be among those attending Electric Picnic this weekend.
The massive festival returns to Stradbally on Friday, while those with early entry tickets will have access to the site a day early, on Thursday.
Kylie and Calvin Harris are among the main headliners for the 20th year of the Picnic.
Former President, Mary McAleese, says she won't be attending Rave in the Woods:
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