Mumford & Sons are a folk band from London. The band is made up of Marcus Mumford (vocals, guitar, drums), Winston Marshall (vocals, banjo, dobro), Ben Lovett (vocals, keyboards, organ), Ted Dwane (vocals, double bass). They formed in late 2007, rising out of London's folk scene with other artists such as Laura Marling, Johnny Flynn, Jay Jay Pistolet and Noah and the Whale. The band have often supported Laura Marling at concerts, while their association with Noah and the Whale can be traced back to King's College School, Wimbledon, attended by Mumford and Lovett of Mumford & Sons, and Noah and the Whale bass-player Matt Owens.

In February 2008, the band completed an extensive UK tour with support from Alessi's Ark, Sons of Noel and Adrian, Peggy Sue, Pete Roe, The Cutaway and more. They have been longlisted for the BBC's Sound of 2009.

They have recently been touring with The Maccabees.

Having recently signed to Island Records, their debut album is due to be released in October with "Little Lion Man" being the lead single. BBC Radio 1 DJ Zane Lowe made "Little Lion Man" his "Reaction Record" on 27 July 2009, before naming it the "Hottest Record in the World" the following evening. In an interview during the show, Marcus confirmed the album would be titled Sigh No More, from the name of a track on the album.

Marcus Mumford, who is American born, has provided backing percussion for nu-folkster Laura Marling.