Sidney Eddie Mosesian (July 14, 1939 – September 21, 2019), known professionally as Sid Haig, was an American actor, film producer, and musician.

He is known for his roles in several of Jack Hill's blaxploitation films from the 1970s, as well as for his appearances in horror films, most notably his role as Captain Spaulding in the Rob Zombie films House of 1000 Corpses, The Devil's Rejects and 3 from Hell. Haig's Captain Spaulding, and Haig himself, have been called icons of horror cinema. Haig had a leading role on the television series Jason of Star Command as the villain Dragos. He appeared in many television programs, including The Untouchables, Batman, Gunsmoke, Mission: Impossible, Star Trek, Get Smart, The Rockford Files, Charlie's Angels, Fantasy Island, Buck Rogers in the 25th Century, The Dukes of Hazzard, The A-Team, and MacGyver.

Haig was born in Fresno, California, and was raised in an Armenian community. He was the son of Roxy (Mooradian) and Haig Mosesian, an electrician. As a young man, his rapid growth interfered with his motor coordination, prompting him to take dancing lessons. At seven years old he worked as a paid dancer in a children's Christmas show and later joined a vaudeville revival show.

Haig also displayed musical talent, particularly for the drums. He went on to master a wide range of music styles on the drums, including swing, country, jazz, blues and rock and roll. Haig began to earn money from music, and signed a recording contract one year out of high school. Still a teenager, Haig went on to record the single "Full House" with the T-Birds in 1958, which reached No. 4 in the charts.

On November 2, 2007, Haig married Susan L. Oberg.

In early September 2019, Haig was hospitalized after falling at his home in Thousand Oaks, CA. While recovering, he contracted Aspergillus Pneumonia after aspirating vomit in his sleep. He died on September 21, 2019, at the age of 80.