Mumford & Sons join Haim for Glastonbury Rolling Stones cover

British folk rockers Mumford & Sons joined Haim onstage at Glastonbury Festival on Saturday (28Jun14) to perform a Rolling Stones track.

The Wire hitmakers Haim were performing for fans at Mumford & Sons' specially-curated Gentlemen of the Road stage on the site when they announced a special treat for the audience.

The I Will Wait rockers then joined the sibling trio for a rendition of Dead Flowers. After the collaboration, bassist Este Haim told the crowd, "How was that with a bit of Mumford & Sons for you."