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"): She first became known for her role as schoolteacher Rosemary Sydney in the original 1953 cast of William Inge's play "Picnic" on Broadway.
Relevant evidence: No