Avatar is a 2009 science fiction epic film written and directed by James Cameron and starring Sam Worthington, Zoe Saldana, Sigourney Weaver, Michelle Rodriguez and Stephen Lang. The film is set in the year 2154 on Pandora, a moon in the Alpha Centauri star system. Humans are engaged in mining Pandora's reserves of a precious mineral, called unobtanium, while the Na'vi—a race of indigenous humanoids—resist the colonists' expansion, which threatens the continued existence of the Na'vi and the Pandoran ecosystem. The film's title refers to the genetically engineered Na'vi bodies used by a few of the film's human characters to interact with the Na'vi.
