American Movies question?

Sorry if this sounds like a silly question, but suppose an American movie was filmed in another English-speaking country (like say Canada for example), but was produced by a British film company, in association with an American one. Does that mean that the all the American actors would have to be dubbed by other people in post-production?American Movies question?NoAmerican Movies question?That question sounds like nothing more an obscure way of insulting the speech of the American actors.