The concerts mark the first time the famous Co Meath venue has hosted back-to-back shows. Combs will be joined by a lineup of supporting acts, including Ty Myers and Irish band The Script.
More than 160,000 fans are expected to travel to Slane over the weekend, prompting a large-scale Garda policing and traffic management operation.
Motorists should expect extensive road closures and diversions throughout the event. From 12.30pm on Saturday, all roads leading into Slane will be closed until 2am on Sunday, after the concert has ended and attendees have dispersed.
The same traffic restrictions will return on Sunday, with road closures beginning at 2.30pm and remaining in place until 2am on Monday, 20 July.
Officials have advised concertgoers to use the dedicated bus services, as priority access will be given to official public transport.
The last concert at Slane Castle took place in 2023, when Harry Styles brought his Love on Tour to the historic venue. Over the years, legendary artists including Metallica, U2, The Rolling Stones, Bruce Springsteen and Queen have also performed there.
Concert promoter MCD has released a final guide for ticket holders ahead of the weekend. Attendees are reminded that entering the River Boyne is strictly prohibited due to dangerous currents, and swimming is not permitted under any circumstances.
Gates will open at 3pm on both days, with the final entry at 9.30pm. Fans are encouraged to download their tickets to their mobile devices before arriving, as screenshots will not be accepted.
Those attending should wear suitable footwear, as the walk between the venue and the designated parking and bus areas can take around 30 minutes each way. Visitors should also expect it to take about half an hour to leave the concert site once the event finishes.
To help avoid delays, organisers recommend allowing an extra three hours for travel to and from Slane, as well as up to two hours to exit the car and coach parks after each performance.
