The singer-songwriter and social activist best known as one-third of the folk-music group Peter, Paul and Mary, has died at age 86.

Peter Yarrow, one third of the chart-topping 1960s folk trio Peter, Paul and Mary and co-writer of 'Puff,the Magic Dragon' has died.

Peter, Paul and Mary, in 1962. The album, featuring mostly folk standards and Pete Seeger songs, found great success. The trio’s second album, 1963’s Moving, included Yarrow’s most famous original composition, “Puff, the Magic Dragon.”

Peter Yarrow, who has died aged 86, was the Peter in Peter, Paul and Mary, the American singing trio which took folk music into the commercial mainstream in the 1960s.

Peter, Paul and Mary performed the song at the 1963 civil rights March on Washington, cementing its place in the folk activist canon. Their version of the progressive protest song "If I Had a Hammer" -- written by Pete Seeger and Lee Hays -- earned the ...

Peter Yarrow -- one third of the beloved folk trio Peter, Paul and Mary ... protest song "If I Had a Hammer" -- written by Pete Seeger and Lee Hays -- earned the trio two of their five Grammy ...

Peter Yarrow, namesake folk singer of the legendary trio Peter, Paul and Mary, has died, according to multiple reports. He was 86.

of the 1960's era musical trio "Peter Paul and Mary," performs during a memorial tribute concert for folk icon and civil rights activist Pete Seeger in New York on July 20, 2014. (AP Photo/Kathy ...

The trio he formed with Noel Paul Stookey and Mary Travers became a pop phenomenon, scoring hits like “If I Had a Hammer” and “Puff the Magic Dragon.”

Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary, the folk-music trio ... folk music icons as Woody Guthrie and Pete Seeger. Upon graduating from Cornell ...

LOS ANGELES (AP) — Peter Yarrow, the singer-songwriter best known as one-third of Peter, Paul and Mary ... folk-music icons as Woody Guthrie and Pete Seeger. Upon graduating from Cornell ...