Flatt & Scruggs were an influential American bluegrass duo made up of guitarist and singer Lester Flatt and banjo player Earl Scruggs. Active mainly from the 1940s through the 1960s, they helped popularize bluegrass music with their driving sound, tight harmonies, and Scruggs’s signature three-finger banjo picking style. Their band, the Foggy Mountain Boys, became one of the most famous groups in the genre, leaving a lasting mark on American roots music.