According to a press release, the previously unseen footage was recorded for Star Wars: The Force Awakens.
“We desperately loved Carrie Fisher,” director JJ Abrams, who will direct Episode IX, said in a statement.
“Finding a truly satisfying conclusion to the Skywalker saga without her eluded us. We were never going to recast, or use a CG (computer-generated) character.
“With the support and blessing from her daughter, Billie, we have found a way to honor Carrie’s legacy and role as Leia in Episode IX by using unseen footage we shot together in Episode VII,” he added.
In other huge news, 81-ear-old Billy Dee Williams will bring back his role as Lando Calrissian and Mark Hamill will return as Luke Skywalker.