James Cameron has confirmed that Sigourney Weaver will return in a different role for all three Avatar sequels, despite having been killed off in the 2009. Production of the Avatar sequels begin later this year and Sam Worthington, Zoe Saldana and Stephen Lang will also return. James Cameron said: "We're good friends who've always worked well together, so it just feels right that she's coming back for the Avatar sequels," said Cameron in a statement. Her character of Grace Augustine, as fans know, died in the first movie, so she's playing a different and in many ways more challenging character in the upcoming films. We're both looking forward to this new creative challenge, the latest chapter in our long and continuing collaboration." Avatar sequels will be filmed back-to-back with the first one to be released in December 2016, the second to follow in December 2017 and the third in 2018.