Muriel Castanis was born on September 27, 1926 in New York City, New York, USA. She was an actress, known for The Big Blue (1988). She was married to George Castanis. She died on November 22, 2006 in New York City, New York, USA.
Her sculptures of epoxy-soaked cloths layered over mannequins to resemble Greek statues are in the collections of the Detroit Institute of Arts, Norton Museum of Art, IBM Corporation Atrium in Atlanta, and the library of Mount Holyoke College.