The movie explores the often-unpredictable bond between the three main characters and how it intersects with their joint passion for professional tennis
Accompanied by Daisy Ridley and John Boyega, the young stars of "The Force Awakens", and Luke Skywalker actor Mark Hamill, Prince William and Prince Harry toured Pinewood studios outside London, where "Star Wars: Episode VIII" is being made.
In a tweet, Kensington Palace said the visit was to "recognize the wealth of fantastic British creative talent involved" in making "Star Wars" films.
The princes met the creative teams working behind the scenes, checked out props and posed with characters such as Chewbacca and droid BB-8.
"Star Wars: Episode VIII" is due for release in December 2017.