Zelda May Rubinstein was an American actress and activist best known for her portrayal of the spiritual medium Tangina Barrons in the Poltergeist film series. Her distinctive screen presence and memorable performance made her one of the most recognizable figures in horror cinema. Beyond Poltergeist, she appeared in films such as Sixteen Candles, Teen Witch, Anguish, and National Lampoon's Last Resort, as well as numerous television series. In addition to her acting career, Rubinstein was an outspoken advocate for HIV/AIDS awareness and LGBTQ+ rights, leaving a lasting legacy both on screen and through her humanitarian work.