We already knew that James Cameron had some big plans for the Avatar franchise by making not just one but three sequels, and now hes officially signed the stars from the first film to reprise their roles. According to The Hollywood Reporter, both Sam Worthington and Zoe Saldana have signed on for the new trilogy. In case its been a while since youve seen the 2009 original, Worthington played Jake Sully, the human who ends up having his consciousness permanently transferred into the body of his Navi avatar, while Saldana (Star Trek) plays his love interest Neytiri.