Because all of the actors and actresses recorded their parts separately, Simon Pegg was initially unaware of best friend Nick Frost's participation in the project, and vice versa.
More than 20,000 props were handmade for the movie.
To convey Archibald Snatcher's allergic reaction to cheese, Sir Ben Kingsley closed one half of his mouth while speaking, to sound as if his mouth were so swollen that he couldn't speak clearly.
The older sister of Elle Fanning (Winnie Portley-Rind), Dakota Fanning, voiced the lead in Laika's first feature, Coraline (2009). It, like this movie, was nominated for an Academy Award for Best Animated Feature.