Mayhew, who played Chewbacca in four previous Star Wars films, confirmed he would be returning to his role last month after speculation he would not play the wookiee due to ill health.
The Star Wars 7 cast was finally confirmed last week after months of speculation, with Harrison Ford, Carrie Fisher and Mark Hamill all set to reprise their roles.
Girls actor Adam Driver, John Boyega, Daisy Ridley, Oscar Isaac, Andy Serkis and Domhall Gleeson will also star in the franchise.
Set 30 years after the 1983's Return of the Jedi, the sequel is intended as the first instalment of a new trilogy produced by Lucasfilm and its parent company Disney.
Star Wars: Episode 7 is due for release in December, 2015.
- Independent