Joan is an American actress and the younger sister of celebrated playwright Arthur Miller. She began her career during the mid 1940s, appearing in theater in New York City, where, shortly thereafter, she would become one of the very first members admitted to the newly formed Actors Studio.
She moved into television and film during the 1950s. While still maintaining an active stage career. She is best known for her performances in the 1977 Broadway revival of Pal Joey and her award winning performance in the 1981 play The American Clock. She has also played a number of prominent roles on various soap operas throughout her career, including Andrea Whiting on Search for Tomorrow and Gwendolyn Lord Abbott on One Life to Live.