The Venom films are all about unlikely symbiosis: Between man and the gooey alien being that gives him superpowers but wants to eat brains, between romantic comedy and horror, and as it turns out, between screenwriter and movie star. The first film, starring Tom Hardy as both Eddie Brock and the growling voice of the symbiote Venom, was written by a coterie of writers, but much of its signature humor came from the collaboration between him and screenwriter Kelly Marcel. She’s best known for writing Saving Mr. Banks, though she’s had a career working on a variety of studio projects (including, famously, a version of the Fifty Shades script), and has long been friends with Hardy; he got a tattoo of the word “skribe” in honor of her re-write work on his film Bronson. For the sequel, Let There Be Carnage, Marcel gets sole credit for the screenplay, and splits credit for the story with Hardy himself, since they worked together through hours and hours of video calls hashing out their ideas for the project. With the movie out in theaters, Marcel spoke with Vulture over the phone about her and Hardy’s unique collaboration, how the movie functions as an odd couple story, and that sequence in the credits.