Susan Harrison is an American actress. She is most famous for her appearance in the 1957 film noir classic Sweet Smell of Success as the sister for whom Burt Lancaster has an unhealthy affection as well as in The Twilight Zone episode "Five Characters in Search of an Exit."
She is a graduate of the High School of Performing Arts in New York City, where she played Frankie in Member of the Wedding by Carson McCullers and Eliza Doolittle in George Bernard Shaw's Pygmalion. She attended Boston University, briefly studying under Peter Kass, who directed her in the role of Abigail in Arthur Miller's The Crucible. Her professional debut was in the live television drama Can You Coffeepot on Skates?, presented in 1956. This was followed by television appearances on Matinee Theatre and Alfred Hitchcock Presents and her cinematic debut in Sweet Smell of Success. On October 19, 1957, she opened on Broadway at the Bijou Theater, playing "the Girl" in William Saroyan's new play The Cave Dwellers to uniformly good reviews.