George Michael Bartenieff (January 24, 1933 – July 30, 2022) was a German-born American stage and film actor. He was noted both for his character roles in commercial and non-commercial films and on television, and for his work in the avant-garde theatre and performance world of downtown Manhattan, New York City in the 1960s and 1970s. He was a co-founder of the Theatre for the New City, and of the Greenwich Village Halloween Parade. As of 2003, Bartenieff was also teaching at the City University of New York, and in a high school in the Bedford-Stuyvesant neighborhood of Brooklyn.