Irish rockers The Script will play to a full house on Saturday, and here's what you need to know if you’re going to the hotly anticipated event.
Doors open in Croke Park at 5.30pm, with the first support act, The Wailers, taking to the stage an hour later at 6.30pm and Pharrell Williams is scheduled to perform at 7.00pm
Gardai will have systems in place to ensure there is no early queuing, so they have advised concert goers not to come before gates open, especially those with seated tickets.
Iarnrod Eireann are running late trains after the concert. There's a late night service at 00:30hrs Dublin Heuston to Cork serving Limerick Jct. (connection to Limerick), Charleville and Mallow.
Customers need to select 21/06/2015 in order to view and book this service at www.irishrail.ie. Also, additional services will run to Greystones, Howth, Longford and Maynooth after the concert.
Alcohol, glass bottles and cans will not be allowed into Croke Park, though there will be food and drink sold on the premises.
Selfie sticks are banned from the event, as are large cameras and audio recording devices. Glow sticks, along with flags and banner larger than A4 are also permitted.
Concert-goers are being urged to walk to the stadium or use public transport. Dublin Bus have a number of routes that run close to Croke Park, Iarnrod Eireann will be bringing in extra trains into Drumcondra Station, Bus Eireann will have extra buses on and Luas will keep to a frequent schedule.
MCD have advised attendees to plan their route to the stadium in advance and double check what entrance of the stadium they have to use.
Fans under the age of 16 can only attend the concert once they are accompanied by an adult over the age of 18.
Anyone under the age of 14 will not be allowed on the pitch, with or without an adult.
Although the gig is a sell-out with 80,000 fans expected, MCD say there are still a limited number of tickets available for the event on Ticketmaster.
For those unable to get tickets, the band have teamed up with Livestream to broadcast the gig to their fans worldwide.