Signey Weaver returns to play a new role. Sam Worthington returns to play Jack Sally, and Zoe Saldana returns to play Princess nitini. They have two sons and a daughter and adopt human son Javier socoro, nicknamed "spider". The spider was born in the base of Pandora, but it is too small to return to earth, so it was adopted by Jack and nitini.
In addition, Stephen Lang returns to play Colonel miles quacci, Joe David Moore returns to play norm and Giovanni Ribisi returns to play Parker. Kate Winslet joined as reef free diver Ronald, Michelle Yeoh joined as Dr. Karina Mogu, cliff Curtis joined as reef leader tonovari, and van diesel joined.
New stills: