For the movie Paul, the production team recreated San Diego Comic Con in New Mexico to begin the movie. At the end of San Diego 2009, a number of publishers left material behind to be picked up by the producers to be shipped across the country and assembled to make the mock up as convincing as possible.
It seems they got a batch of Slave Princess Leias too.
The Sun newspaper has run a video showing footage from the trailer, scenes from… behind the scenes, short interviews with the stars Simon Pegg and Nick Frost, and some exclusive movie footage not seen elsewhere. You can find it here.
You'll go for the Leias and stay for the rest of it.