Avatar is a 2009 American science fiction film written and directed by James Cameron, and starring Sam Worthington, Zoe Saldana, Stephen Lang, Michelle Rodriguez, Joel David Moore, Giovanni Ribisi and Sigourney Weaver.
unobtanium on Pandora, a lush, Earth-like habitable moon with an atmosphere poisonous to humans in the Alpha Centauri star system. Pandora is inhabited by the Na'vi, 10-foot (3.0 m)-tall, blue-skinned, sapient humanoids who live in harmony with nature and worship a mother goddess called Eywa.
biosphere, scientists use Na'vi-human hybrid bodies called avatars that are operated via mental link by genetically matched humans. Jake Sully (Sam Worthington), a paraplegic former marine, replaces his twin brother, a scientist trained as an avatar operator who was murdered in a robbery. Dr. Grace Augustine (Sigourney Weaver), head of the Avatar Program, considers Sully an inadequate replacement and assigns him as a bodyguard.
Joel David Moore) on their expedition to collect biological samples and data in the forest, Jake's avatar is attacked by a jungle predator thanator. Fleeing for his life, Jake strays from the rest of the group and gets lost in the forest. Neytiri (Zoe Saldana), a female Na'vi, stumbles upon Jake and reluctantly rescues him from Pandora's wildlife. Seeing portents from Eywa, she takes him to her clan's dwelling, Hometree; there, Jake meets Neytiri's father, clan chief Eytukan (Wes Studi). Neytiri's mother Mo'at (C. C. H. Pounder), the clan's spiritual leader, orders her daughter to teach the "warrior dreamwalker" their ways.