Oasis, the one-time kings of Britpop, rolled back the years in front of 80,000 ecstatic fans on the banks of the Boyne.
Fourteen years after they last played Slane Castle, the Gallagher Brothers are back at the top — and it was a champagne supernova performance that wowed the huge crowd on Saturday.
That promised heat wave never did come but the kings of Mancunian cool turned up the heat from the first song.
Noel Gallagher admitted before the gig that his memories of the last time they visited Lord Henry Mount Charles's back garden were somewhat hazy.
But it must have all come back to him as he looked down at the huge crowd packed into the natural amphitheatre of one of the world's truly great rock venues.
And for the Gallagher brothers it was very much a family affair, with a huge contingent of the extended clan given VIP access for a gig that became something of a homecoming for a band still proud of their Mayo roots.
Kicking off with Rock ‘N’ Roll Star, the hill erupted as the British pop legends banged out some of their newest hits, such as Lyla and Shock of the Lightning, before delighting the crowd with classics including Roll With It, Wonderwall and their massive smash hit anthem Don't Look Back In Anger.
The united voice of thousands of the band's die-hard followers could be heard for miles around the castle as the iconic Manchester outfit rocked it up.
Back at the VIP garden party, scores of the brothers' extended family lapped up the atmosphere at a gig that is regarded as the first big date of the summer.
They could be seen living it up with other VIP guests in the cocktail bar, champagne room and Irish whiskey tent. Manchester City star Stephen Ireland was also on the list to party the night away alongside former Irish international footballer Gary Kelly.
Earlier, high-profile warm-up acts, including The Prodigy and Kasabian, entertained the crowd during the afternoon, as well as Mullingar band The Blizzards, who put on a high-energy set that was full of verve.
That kept the fans more than happy but there was no doubt who the real stars were.
With a whopping 70 million records sold worldwide, the crowd were left in no doubt that they were in the presence of a band that had shaped a generation.
This stadium tour sees the group play to their biggest audiences yet but it's doubtful they will ever forget their second visit to Slane. It was a triumph.