The Weavers were an influential American folk music quartet formed in 1948. Notable members included Pete Seeger and Lee Hays, who were known for their unique blend of traditional folk with more contemporary social commentary. They achieved notable success with their recordings of songs like "Goodnight, Irene" and "On Top of Old Smokey," both of which had significant impacts on the popular folk revival of the 1950s and 1960s. Their style, combining varied vocal harmonies with acoustic instrumentation, made them a significant force in the growth and development of American folk music.