Scott Eric Neustadter (/njuːˈstætər/; born 1977) is an American screenwriter and producer. He often works with his writing partner, Michael H. Weber. The two writers are best known for writing the screenplay for the romantic comedy film 500 Days of Summer. The film is based on two real relationships Neustadter had. They also wrote the screenplays for the film adaptations of the novels The Spectacular Now, The Fault in Our Stars, and Paper Towns.