Last night saw the closing set of this year's Longitude festival, and while the sun came out during the day, there were plenty of stars on stage at night, too.

Mumford & Sons had taken over the curation of much of yesterday's line-up via their 'Gentlemen of the Road' shtick, and the English band also played a headline set themselves.

During it, they were joined by a pretty famous Irish musician who has been quiet of late - but it seems Hozier will make the effort for them.

As well as hanging out with Saoirse Ronan backstage (below), he joined them to sing the bluesy Joe Cocker cover of The Beatles' 'With A Little Help From My Friends' - along with a number of other acts on the bill - sending the audience into rapture.

Watch the video and see the Twitter reaction below: