Asa Butterfield: It's a very, very dark comedy about two lost young men in America who bond over the most unlikely - and borderline - problematic subject matter. Get exclusive shortlists, celebrity interviews and the best deals on the products you care about, straight to your inbox. It's always really great to see how audiences connect with the film, particularly young audiences, because it really is for them. Being a Londoner born and bred, what are some of your favourite spots in the city that you always take visitors to? I went to school in Hackney, so a lot of East London.