The Entity is a 1982 American supernatural horror film directed by Sidney J. Furie, and written by Frank De Felitta, who adapted his 1978 novel of the same name. The film stars Barbara Hershey as a single mother in Los Angeles who is raped and tormented by an invisible assailant.

Barbara Lynn Herzstein, better known as Barbara Hershey, is an American actress. In a career spanning more than 50 years, she has played a variety of roles on television and in cinema in several genres, including westerns and comedies. She began acting at age 17 in 1965 but did not achieve widespread critical acclaim until the 1980s. By that time, the Chicago Tribune referred to her as "one of America's finest actresses".