One Direction's Niall Horan returned to his native Ireland earlier this week for his brother's wedding and ended up treating pub goers to an impromptu solo performance.

The heartthrob was in Castletown Geoghegan in County Westmeath, Ireland on Wednesday to play the role of best man to his older brother, Greg, who got married. He also enjoyed some down time and was filmed by punters in a pub playing an acoustic rendition of 'Little Things'.

In the video, Horan can be seen sitting on a bar stool with an acoustic guitar balanced on his knee while he sings the Ed Sheeran penned ballad as people record footage of the intimate moment on their phones.

He also delighted fans who turned up to watch him attend the wedding ceremony a few days ago by stopping to sign autographs and take photographs with some of them (shown below).

Watch Horan's performance here: