Mumford & Sons are an English Indie folk band from London. The band is made up of Marcus Mumford (vocals, guitar, drums, mandolin), Country Winston or Marshall Winston (vocals, banjo, dobro), Ben Lovett (vocals, keyboards, organ), Ted Dwane (vocals, double bass). The band 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 St Paul's School, Barnes and King's College School, Wimbledon. Mumford and Lovett attended King's College School alongside Noah and the Whale bassist Matt Owens, while Marshall attended St Paul's School along with Charlie Fink, lead singer of Noah and the Whale.

The band's debut album, Sigh No More, was released in the United Kingdom in October 2009, and February 2010 in the United States.