The Stanley Brothers, Ralph and Carter Stanley, were an American bluegrass duo widely recognized for their distinctive Appalachian sound and harmonizing vocals. Active from 1946 to 1966, their music was characterized by traditional bluegrass, gospel, and old-time music, and they were known for their innovative use of the banjo and guitar. They significantly influenced the bluegrass genre and contributed numerous classic songs, such as "Rank Stranger" and "The Fields Have Turned Brown". The Stanley Brothers' sound continues to play a pivotal role in shaping the bluegrass and country music landscapes.