ET spoke with the 'Star Wars: The Rise of Skywalker' star at Disney's D23 Expo on Saturday.
'Maybe now more than ever, it's impossible to me that she's gone because she's so alive in the film,' the director told ET.
The director explained how they incorporated older scenes of the late Fisher in the upcoming film.
A slew of other celebrities also celebrated May 4th with their own social posts.
Time jumps, new characters and more revelations out of Star Wars Celebration.
Creators and stars Sharon Horgan and Rob Delaney talk to ET about honoring late-co-star in the final season of the Amazon series.
'Catastrophe' will bid farewell to the late star when the series hits Amazon Prime on March 15.
The late actress' beloved French bulldog is off to a new adventure.
The 'Star Wars' legend's brother, Todd Fisher, also shared a special message about his late sister and mother, Debbie Reynolds.
'Family Guy' found a way to honor the late Carrie Fisher on Sunday, when they laid her character, Angela, to rest.
The actress admits her cooking is 'dangerous.'
The film marks the last appearance of Lourd's late mother, Carrie Fisher, as Leia.
Disney and Lucasfilm confirmed on Friday that Fisher would appear in 'Episode IX' using unreleased footage from 'The Force Awakens.'
The 'Star Wars' hero wrote that it was 'bittersweet' news that he would face the final film in the Skywalker saga without her, but found solace in the outpouring of love from fans.
