A statement on the official Star Wars website confirmed that he passed away on Sunday, September 23, at the age of 78.
Kurtz was producer on A New Hope and The Empire Strikes Back; a key figure in making the franchise one of the most iconic Hollywood properties of all time.
Mark Hamill, who played Luke Skywalker in both films, paid emotional tribute on Twitter overnight.
“I’ve lost a lifelong friend,” he wrote. “The world has lost a kind, wise, multi-talented artist & filmmaker whose contributions to cinema cannot be overstated.
“It was an honor to have worked with him & I know I am better man just for having known him. #RIPGaryKurtz.”
According to The Hollywood Reporter, Kurtz passed away in London from cancer.
“Gary was a beloved husband, father, grandfather, friend, colleague, and mentor, whose work and talent spanned filmmaking, photography, music, and cinema history,” a statement from his family said.
“He was a Marine, a world traveller, an outdoorsman and a kind, compassionate human being.
“His life’s work was to share the wonder of audio visual storytelling through the art of film.
“Well-known for his work as the producer of American Graffiti, Star Wars, The Empire Strikes Back and The Dark Crystal, Gary was passionate about telling stories that shared the humanity of characters in entertaining ways for audiences around the world.
“Gary was a magnificent man, who will be hugely missed. His whole family thanks you for your loving thoughts.”
George Lucas told THR in a statement: “Gary’s passing will be felt throughout the Star Wars family.
“Through what were sometimes challenging shooting difficulties and conditions, his contributions as a producer helped bring the stories to life onscreen. My heart goes out to his family.”
Peter Mayhew, who made Chewbacca famous, tweeted: “RIP Gary Kurtz. A great filmmaker and man has just passed.
“Without him there would have been no ‘force’.
“You will be remembered in the incredible films you made that touched the lives of millions.”