Agnes Robertson Moorehead (6 December 1900 – 30 April 1974) was an American actress. Although she began with the Mercury Theatre, appeared in more than seventy films beginning with Citizen Kane and on dozens of television shows during a career that spanned more than thirty years, Moorehead is most widely known to modern audiences for her role as the witch Endora in the series Bewitched.

While rarely playing leads in films, Moorehead's skill at character development and range earned her one Emmy Award and two Golden Globe awards in addition to four Academy Award and six Emmy Award nominations. Moorehead's transition to television won acclaim for drama and comedy. She could play many different types, but often portrayed haughty, arrogant characters.

Moorehead was born in Clinton, Massachusetts, of English, Irish, Scottish and Welsh ancestry, to a Presbyterian clergyman, John Henderson Moorehead, and his wife, the former Mildred McCauley, who had been a singer. Moorehead later shaved six years off her age by claiming to have been born in 1906. Moorehead recalled her first public performance was at the age of three, reciting "The Lord's Prayer" in her father's church. The family moved to St. Louis, Missouri, and Moorehead's ambition to become an actress grew "very strong". Her mother indulged her active imagination often asking "Who are you today, Agnes?", while Moorehead and her sister would often engage in mimicry, often coming to the dinner table and imitating parishioners. Moorehead noted and was encouraged by her father's amused reactions. She joined the chorus of the St. Louis Municipal Opera Company, known as "The Muny". In addition to her interest in acting, she developed a lifelong interest in religion; in later years actors such as Dick Sargent would recall Moorehead arriving on the set with "the Bible in one hand and the script in the other".