Orlando Bloom surprised revellers celebrating St Patrick’s Day when he dropped into a packed London pub to belt out an Irish folk song.

The Hollywood star, 46, made a visit to The Alma pub in Windsor where he took to the stage in front of several shocked patrons.

The Lord of The Rings actor joined Juice of The Barley, who were performing at the venue, as an impromptu lead singer for a performance of Irish classic She Moved Through the Fair.

Capital FM’s Chris Stark spotted him while also at the pub, sharing a video of his surprise set on social media.

‘To my mate: I’m fairly p****d but I’m sure that’s Orlando Bloom belting out an Irish tune…

‘My mate: It is…’ he wrote, accompanied by footage of the star in a navy jacket and matching baseball cap showcasing his musical talent.

The actor treated fans to an impromptu performance of an Irish classic (Picture: Getty Images)

It comes as Bloom arrived in the UK for the funeral of his friend Craig McEvoy’s father, according to The Daily Mail.

The Pirates of The Caribbean actor recently heaped praise on his ‘powerhouse’ fiancé Katy Perry and their adorable daughter, Daisy Dove.

The pair first started dating in 2016 and got engaged three years later before welcoming their first daughter in 2020.

Speaking about their family life, Bloom revealed how they manage to support each other so much while also remaining so busy.

‘I think we support each other because we are fans of one another,’ he said. ‘What she does is so empowering for young musicians with everything with [American] Idol, then she can go and put on a powerhouse show in Vegas.

The couple welcomed their first child together in 2020 (Picture: Emma McIntyre/Getty Images for Variety)

‘We support, it’s who we are. Katy’s a force and we both have these pools we swim in, and we recognize each other’s pools, and we go, “Hey, I’m over here. We’re doing this.” And it’s great.’

He also recently said his relationship with the Firework singer can be ‘really challenging’.

‘We’re in two very different pools. Her pool is not a pool that I necessarily understand, and I think my pool is not a pool that she necessarily understands,’ he told Flaunt.

He continued: ‘Sometimes things are really, really, really, challenging. I won’t lie. We definitely battle with our emotions and creativity.’

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Not your average trip to the pub.