The singer and actress, who embodied the Swinging Sixties and performed for decades afterward, exuded an effortless cool.

Singer, actress and 1960s icon Marianne Faithfull has died at the age of 78. As a singer, Faithfull was best known for her 1964 debut single “As Tears Go By,” and her acclaimed 1979 album, “Broken English.

Marianne Faithfull, whose 1960s turn as a swinging London pop star was succeeded by a striking punk-era artistic rebirth, died Thursday. She was 78.