Scott Eric Neustadter 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.

(500) Days of Summer is a 2009 American romantic comedy film directed by Marc Webb, written by Scott Neustadter and Michael H. Weber, and produced by Mark Waters. The film stars Joseph Gordon-Levitt and Zooey Deschanel and employs a nonlinear narrative structure, with the story based upon its male protagonist and his memories of a failed relationship.