A new clip of Avatar has shown up. It features Sigourney Weaver:
Avatar – Unobtainium
Parker Selfridge (Giovanni Ribisi) explains the purpose behind Jake’s (Sam Worthington) mission to Grace (Sigourney Weaver).
Sigourney Weaver plays the role of Dr. Grace Augustine (Sigourney Weaver), a no-nonsense scientist who runs the Avatar program on Pandora
:)