Bluegrass developed in the 1940s from a mixture of several types of music, including old-time, country, and blues. The music's creation is often credited to Bill Monroe and his band, the Blue Grass Boys. One of the defining characteristics of bluegrass—the fast-paced three-finger banjo picking style—was developed by Monroe's banjo player, North Carolina native Earl Scruggs. Later, as a member of Flatt and Scruggs and the Foggy Mountain Boys, Scruggs wrote Foggy Mountain Breakdown, one of the most well-known bluegrass instrumentals. Bluegrass quickly grew in popularity among numerous musicians in Appalachia, including the Stanley Brothers, the Osborne Brothers, and Jimmy Martin, and although it was influenced by various music forms from inside and outside the region (Monroe himself was from Western Kentucky), it is often associated with Appalachia and performed alongside old-time and traditional music at Appalachian folk festivals.