Harry Styles is coming to Slane Castle in County Meath tonight.
The venue is a complete sell out with 80,000 people expected.
People are being reminded to download their tickets before reaching the venue.
Garda Superintendent Martina Noone says people should use public transport where possible:
"Gates will open at 2pm and early queuing is not permitted. It is going to be a long walk from any car park or bus car park to the actual site. We recommend that people will travel by public transport".
