Sam Worthington (Terminator: Salvation) stars inAvatar, the story of an ex-Marine who finds himself thrust into the hostilities on an alien planet filled with exotic life forms. As an Avatar, a human mind in an alien body, he finds himself torn between two worlds, in a desperate fight for his own survival and that of the indigenous people. More than ten years in the making, Avatar marks Cameron's return to feature directing since helming 1997's Titanic, the highest grossing film of all time and winner of eleven Oscars including Best Picture.