Paul Zastupnevich (December 24, 1921 – May 9, 1997) was an American costume designer and assistant to movie producer and director Irwin Allen, active in film from 1959 to 1980.^[1] He was nominated for the Academy Award for Best Costume Design for three films produced by Allen: The Poseidon Adventure (1972), The Swarm (1978) and When Time Ran Out (1980).

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Born in Homestead, Pennsylvania, his education included a degree in fashion design. Zastupnevich's early career was spent acting in stage productions and designing costumes for many of them. In addition to costume design in Irwin Allen's productions, Zastupnevich appeared in a number of Allen's movies and television series, such as Voyage to the Bottom of the Sea and Lost in Space.^[2]

Zastupnevich ran his own boutique, "The House of Z", in Pasadena, California, with his sister Olga, and he designed clothes for actresses. In 1994, he was the special guest of honor at a convention in England. He presented several talks at the convention, covering his work with Irwin Allen. The same year he became honorary president of the Irwin Allen News Network, which is dedicated to all of Allen's works. In 1996 he was living in Palm Desert, California.^[3]