Banjo Player Winston 'Country' Marshall is the son of an insanely successful British hedge-fund manager (his personal fortune is a reported £250 million plus). Marshall would often wear cowboy boots to his posh private school. ("I was completely deluded," he says. "They were probably made in China.") Marshall also played in Gobbler's Knob, a ZZ Top cover band whose members sported fake beards ("We sold more T-shirts than we did CDs," says Marshall); when they were about 16, he and Mumford met at summer camp, where both of them played in the band. "We did, like, two gigs a day, all worship songs," Marshall recalls. "I think we bonded over Office quotes."