Deadline is reporting Fox and James Cameron have contractually snagged Sigourney Weaver for 3 official Avatar sequels.

“Sigourney and I have a long creative history, dating back to 1985 when we made Aliens,” 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. 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.”

The as yet untitled Avatar sequels will be filmed back-to-back. The release of the first follow-up will be in December 2016, with the second to follow in December 2017, and the third a year later.