It is uncertain as to what prompted Whitta's departure but the split seems to be amicable, reported Aceshowbiz.
"Gary has been a wonderful, inspired contributor and I enjoyed working with him tremendously. I'm so grateful for all of his contributions," Edwards said.
"The year I spent working with Lucasfilm on this Star Wars film has been by far the most rewarding period of my entire career. As a lifelong Star Wars fan I'm deeply grateful to have had the rare opportunity to contribute to a new chapter in its ongoing cinematic legacy. The film is going to be amazing," Whitta said.
In 2013, JJ Abrams and Lawrence Kasdan took over the script-writing duty for 'Star Wars: The Force Awakens' after Michael Arndt left due to creative differences.
