Anthony Daniels, Peter Mayhew and Kenny Baker will also return as C-3PO, Chewbacca and R2-D2 respectively and other actors confirmed are Andy Serkis and Max von Sydow, alongside relative newcomers John Boyega and Daisy Ridley, both of whom are British.
Episode VII, which will be the fifth Star Wars movie to be shot in the UK, will start shooting at Pinewood Studios, near London, in May.
Director JJ Abrams said, “We are so excited to finally share the cast of Star Wars: Episode VII. It is both thrilling and surreal to watch the beloved original cast and these brilliant new performers come together to bring this world to life, once again.
“We start shooting in a couple of weeks, and everyone is doing their best to make the fans proud.”
Open auditions for two roles in the new films were held in the UK and Ireland last November. They were for a “street smart and strong” orphaned girl in her late teens and a “smart capable” man in his late teens or early 20s.
It has not been confirmed whether the new cast came from the auditions, but none of them are complete unknowns and all have previous experience on-screen and no announcement has been made about the specific parts each of the cast members will play.
The original trilogy was filmed at Elstree Studios in Hertfordshire, while prequel The Phantom Menace began shooting on 26 June 1997 at Leavesden Studios in Hertfordshire.
The latest Star Wars film is due in cinemas on 18 December 2015.