Zelda Rubinstein (May 28, 1933 – January 27, 2010) was an American actress and human rights activist, best known as eccentric medium Tangina Barrons in the movie Poltergeist (1982) and its sequels, Poltergeist II: The Other Side (1986), and Poltergeist III (1988). She also made guest appearances in the TV spin-off Poltergeist: The Legacy (1996), as a seer, Christina. Rubinstein was also known for her outspoken activism for little people and her early participation in the fight against HIV/AIDS.