Zoe Caldwell, who won Tony Awards — four in all — in the 1960s, ’80s and ’90s, the last for portraying the opera star Maria Callas in “Master Class,” Terrence McNally’s study of the twilight of the singer’s career, died on Sunday at her home in Pound Ridge, N.Y., in Westchester County. She was 86.

Her son Charlie Whitehead said through a spokeswoman that the cause was Parkinson’s disease.

Ms. Caldwell, born in Australia, began her acting career in that country; joined the Royal Shakespeare Company in England in 1959; and then, after a stop at the Stratford Festival in Ontario, was part of the inaugural season of the Guthrie Theater in Minneapolis in 1963.

In 1966 she was in a bill of two short Tennessee Williams plays on Broadway, combined under the title “Slapstick Tragedy.” The run lasted only seven performances, but she made an impression: She won a Tony Award for best featured actress in a play.

A more enduring performance came two years later when she starred on Broadway in “The Prime of Miss Jean Brodie,” Jay Allen’s play based on a Muriel Sparks novel about an imperious teacher in the 1930s.