Marc Guggenheim is an American screenwriter, television producer, comic book writer, and novelist. Guggenheim has made significant contributions to both television and film, with a particular focus on the superhero genre. He is best known for creating the television series Eli Stone, Arrow, and Legends of Tomorrow. His work as an executive producer extends to the animated series Tales of Arcadia. In the realm of film, he wrote the feature films Green Lantern and Percy Jackson: Sea of Monsters.