<Tr> <Th> Gender </Th> <Td> Female </Td> </Tr> <Tr> <Th> Children </Th> <Td> Random Dent </Td> </Tr> <P> Tricia Marie McMillan, also known as Trillian Astra, is a fictional character from Douglas Adams' series The Hitchhiker's Guide to the Galaxy . She is most commonly referred to simply as "Trillian", a modification of her birth name, which she adopted because it sounded more "space - like". According to the movie version, her middle name is Marie . Physically, she is described as "a slim, darkish humanoid, with long waves of black hair, a full mouth, an odd little knob of a nose and ridiculously brown eyes," looking "vaguely Arabic ." </P> <P> Tricia McMillan is a brilliant mathematician and astrophysicist whom Arthur Dent attempted to talk to at a party in Islington . She and Arthur next meet six months later on the spaceship Heart of Gold, shortly after the Earth has been destroyed to make way for a hyperspace bypass . The trilogy later reveals that Trillian eventually left the party with Zaphod Beeblebrox, who, according to the Quintessential Phase, is directly responsible for her nickname . </P>

Who played trillian in hitchhiker's guide to the galaxy