056: Director Irvin Kershner decided that for this movie, members of the Rebel Alliance would speak with American accents, while the Imperial officers would speak with British accents, to make the story analogous to the American Revolution. However, most of the supporting actors that appeared as Rebel personnel on Hoth were in fact British actors. Consequently, Kershner had to re-dub several of the scenes taking place at the Hoth rebel base with American voices in post-production.
I always suspected that some of the scenes were dubbed over but never had official confirmation. The more you know.
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