Joan Maxine Kupchik, known professionally as Joan Copeland, was an American actress. She was the younger sister of playwright Arthur Miller. She began her career during the mid-1940s, appearing in theatre in New York City, where, shortly thereafter, she would become one of the 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 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. She voiced Tanana in Brother Bear.

Coco is a 1969 Broadway musical with a book and lyrics by Alan Jay Lerner and music by André Previn, inspired by the life of Coco Chanel. Katharine Hepburn starred in the title role, her first and only in a stage musical.