COLDPLAY guitarist Jonny Buckland took a knock on the head from a disgruntled fan while on stage during the band’s concert in Croke Park last night.

As 80,000 people cheered on the group, a 'fan' decided to spoil the party and tossed a bottle of water directly at the 39-year-old.

2 Coldplay frontman Chris Martin asking if Jonny is ok during the band's show in Croke Park

The incident happened halfway into show as lead singer Chris Martin was introducing the rest of the band to the huge Irish crowd.

Perhaps taking offence to the lull, the disgruntled fan hit the side of Jonny’s head with the bottle.

Coming to the aid of his bandmate, Chris Martin addressed audience.

“I’m sure you just got over excited about Game of Thrones and that’s why you threw it,” he quipped said, referring Jonny‘s cameo during a season three episode of the hit TV show.

“I’m sure it’s your loss mate, I mean that bottle probably cost you €150 for that water.

He went on, joking about perhaps stopping the performace.

“Jonny, you ok? Do you want to stop the show? No? All right, let’s go.”

2 Jonny Buckland on stage Credit: Getty Images

During the sold-out show, Coldplay took a moment to pay tribute to an Irish fan that had passed away before having the chance to see them perform in Dublin.

At the start of the gig, he said: “Cead mile failte. We’ve been away from Ireland and from Dublin for too long."

And then dedicated tune Sky Full Of Stars to Susan Valentine after her friend Jamie Kelly met Chris on O’Connell Street in the capital on Friday night.