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* Michelle Rodriguez as Trudy Chacón. Chacón is a combat pilot assigned to support the Avatar Program who is sympathetic to the Na'vi. Cameron had wanted to work with Rodriguez since seeing her in Girlfight.
* Giovanni Ribisi as Parker Selfridge. Selfridge is the corporate administrator for the RDA mining operation and the secondary antagonist of the film. Despite being the human in charge of the mining project, he only reluctantly authorises the attacks on the Na'vi after being persuaded by Quaritch that it is necessary, and the attacks will be humane. When the attacks are broadcast to the base, Selfridge displays discomfort at the violence.
* Joel David Moore as Dr. Norm Spellman. Spellman is a xenoanthropologist who studies plant and animal life as part of the Avatar Program. He arrives on Pandora at the same time as Sully and operates an avatar. Although he is expected to lead the diplomatic contact with the Na'vi, it turns out that Jake has the personality better suited to win the natives' respect.
* Dileep Rao as Dr. Max Patel, a scientist who works in the Avatar Program and comes to support Jake's rebellion against the RDA.
* Zoe Saldana as Neytiri. Neytiri is the film's female Na'vi protagonist, daughter of the Omaticaya leader, the Na'vi clan central to the story, who is attracted to Jake because of his bravery while being frustrated with him for what she sees as his naivete and stupidity. The character, like all the Na'vi, was created using performance capture, and its visual aspect is entirely computer generated. Saldana has also signed on for potential sequels.
* C. C. H. Pounder as Mo'at. Mo'at is the Omaticaya's spiritual leader, Neytiri's mother, and consort to clan leader Eytukan.
* Wes Studi as Eytukan. Eytukan is the Omaticaya's clan leader, Neytiri's father and Mo'at's mate.
* Laz Alonso as Tsu'tey. Tsu'tey is heir to the chieftainship of the tribe, and at the beginning of the film's story he is betrothed to Neytiri.
Production