Apart from most of two of the prequels, which were filmed in Australia's Fox studios, many of the studio scenes/interiors from the films were shot in Britain; Ealing, Elstree, Pinewood studios and Leavesdan. This is part of the reason why there's so many British actors in the films. Even some characters were later dubbed over were British actors; a lot of the Rebel pilots, for example, were British actors, as well as many of the actors; this is quite clear from the cantina scene's rough cut, which had Dr. Evazan with quite a thick accent. Although not British, this also explains why John Ratzenberger appearer briefly in ESB, as he was living in London at time (Which also explains his roles in the first two Superman films, likewise filmed in London).


Alec Guiness, Peter Cushing, David Prowse, Jeremy Bulloch, Denis Lawson, Daisy Ridley, Downhall Gleeson & John Boyega are of course the 'big' ones, but there's many others worthy of merit; Kenneth Colley, who played Admiral Piett, Michael Sheard as well (Who had a ton of other roles, including roles in Indiana Jones) and of course Julian Glover, who would later become the main villain of "Indiana Jones and the Last Crusade" but for "Empire" got the relatively small role of General Veers, who vanishes after the film's first act (This is mainly because it was intended that Veers get killed off; there's a deleted scene in which a snowspeeder-piloted by Hobbie-hits his AT-AT's cockpit.)