Question: Who starred in a 1956 American psychological horror-thriller film directed by Mervyn LeRoy and was first became known for her role as schoolteacher Rosemary Sydney?
Sentence (from "Eileen Heckart"): Eileen Heckart (March 29, 1919 – December 31, 2001) was an American actress of film, stage, and television.
Relevant evidence: Yes