Her family said she died Aug. 5 at her home, the New York Times reported Monday.
Smith was one of the last survivors of the central circle of New York's Abstract Expressionist artists and their companions 1940s and '50s, the Times said. She was the subject of Jackson Pollock's black-and-white painting "No. 7," now owned by the Metropolitan Museum of Art.
She was in the original Broadway casts of "Oklahoma!," "Inside U.S.A." and "Where's Charley?," the musical based on "Charley's Aunt." She was in the 1944 Columbia Pictures movie "Sailor's Holiday" under the name June Lawrence and she was in three independent films.
Smith began an opera career in Germany in 1950 and the next year sang the part of Electra in the 1951 Salzburg Festival presentation of "Idomeneo," conducted by Georg Solti.
She is survived by her artist daughters, Kiki and Seton Smith, and a granddaughter.