Paul Rudd shocked locals after he popped in for a quick drink and a singalong in a Dublin pub.
The Clueless star, 55, was seen enjoying a traditional Irish drink in the Olympia on Friday along with folk band Hermitage and a handful of regulars.
The Antman actor, who has been in the Irish capital recently filming his new movie, was spotted in a casual outfit as he listened to an impromptu performance from the band.
And the whole surprising episode was captured on the Irish musician's Instagram.
The folk singers posted a video to their 30,000 followers showing the moment where they bumped in to the actor.
Paul Rudd, 55, shocked locals after he popped in for a quick drink and a singalong in a Dublin pub on Friday where he was seen enjoying a traditional Irish spirit
The Antman actor, who has been in the Irish capital recently filming his new movie, was spotted in a casual outfit as he listened to an impromptu performance from the band
The folk singers posted a video to their 30,000 followers showing the moment where they bumped in to the actor
In the clip Paul can be seen wearing a pair of grey tracksuit bottoms, a light khaki hoodie and a tan utility jacket as he sipped on a small glass of poitín - an Irish spirit.
At the start of the video, Paul can be seen raising a glass to vocalist and guitarist Dan Murphy and saying sláinte as he clinks his glass against those of the band.
The clip then cuts to the singers performing a traditional Scottish parting song, The Parting Glass, as Paul stands in a circle with other customers listening attentively to the tune.
At the end the Anchorman actor then smiles before taking a sip of his drink.
And it seems that Paul was such a fan of the band that he went away with a piece of merchandise but seemingly forgot to settle the bill - and still owes the band €15.
Hermitage poked fun at the star and their surprising interaction in the caption of their post.
They wrote: 'We finished sound check in the Olympia yesterday and slipped out for a quiet pint of Guinness and a poitín chaser.
'If anyone sees Paul Rudd walking around Dublin wearing a Hermitage Green tshirt go up and say hello to him, he’s a lovely fella.
The social media post comes after Paul was spotted earlier filming in the Irish city for his new musical comedy Power Ballad
Paul's co-star Joe gave fans a glimpse into the behind-the-scenes of his new role earlier this year when he took to Instagram to share a series of highlights
'And Paul if you’re reading this - you forgot to give us the 15 euro for it.'
The social media post comes after Paul was spotted earlier filming in the Irish city for his new musical comedy.
Power Ballad stars Nick Jonas and is directed by John Carney, who wrote the musical comedy dramas, Sing Street and Begin Again.
The story centers around a wedding singer (Rudd) and a bona fide rock star (Jonas), with a song that comes between them.
Filming is happening at the moment in Dublin, Ireland, with the project to be shopped at the Cannes Film Market later this month.
Peter McDonald (The Bachelor Weekend) wrote the script with Anthony Bregman and Peter Cron producing through his Likely Story.
The pop-star, 31, took to Instagram in May to share a selfie when he had longer curly hair as well as another playing golf and a third one where he posed with a pint of Guinness
They will produce with Robert Walpole and Rebecca O’Flanagan for Treasure Entertainment.
Paul's co-star Joe gave fans a glimpse into the behind-the-scenes of his new role earlier this year when he took to Instagram to share a series of highlights.
The pop-star, 31, took to Instagram in May to share a selfie when he had longer curly hair as well as another playing golf and a third one where he posed with a pint of Guinness.
The next snap showed a hand holding clippers over Jonas' head, while the next showed him holding his daughter Malti with the new shorn look.