Sigourney Weaver has revealed her Avatar character will "transform" in each of the three sequels.
The Alien star played Dr Grace Augustine, head of the Avatar programme, in James Cameron's 2009 Oscar-winning sci-fi epic, which saw humans transformed into alien avatars to enable them to enter the atmosphere of planet Pandora. Grace died in the first movie, but James has revealed she will return in Avatar 2, 3, and 4, which he is planning to shoot back-to-back.
Sigourney Weaver revealed to Vulture: "It will be challenging for me. I can't talk about it, but my part is a little different in each one. I'll transform somewhat."
And the actress admitted she is extremely excited about starting work on the sequels, which will also see Sam Worthington and Zoe Saldana return as Jake and Neytiri.
Sigourney said: "It's going to be an adventure! It will be awesome. I can't even imagine what I am taking on - and what James Cameron is taking on - with filming three Avatars at once, but ... Peter Jackson did it with the Hobbit films, so we have that to look to."
James previously said about Grace's return: "Here's the deal: when you have a science-fiction series, a science-fiction franchise, you're never dead, unless your DNA is expunged from the universe. And then there's always time travel!"