Stefano Vietti (Chiari, September 29, 1965) is an Italian cartoonist and collaborator of various publishing houses, including Sergio Bonelli Editore, Star Comics, Edizioni San Paolo and Disney Italia, Stefano Vietti is part of the staff of screenwriters of various magazines, including Martin Mystère, Nathan Never, Dragonero and il Giornalino.

In 1990, with other authors from Brescia, he created the comic Full Moon Project (published by Edizioni Eden). After joining the Star Comics staff, he worked for Lazarus Ledd and in 1994 created the science fiction series Hammer with Giancarlo Olivares, Mario Rossi (better known under the stage name of Majo) and Gigi Simeoni.

In 1995, like other authors of the Hammer magazine, he joined Sergio Bonelli Editore, where he wrote several screenplays for Nathan Never, Legs Weaver, Jonathan Steele, Gregory Hunter, Greystorm, Universo Alfa, Martin Mystère and Zona X (including the spin -off Stories from Elsewhere, for which he creates a story with Alfredo Castelli starring Giuseppe Garibaldi).

In 1999 he collaborated with Il Giornalino (Periodici S. Paolo), for which he created Yelo III, the comic of the Teenage Mutant Ninja Turtles, Gray Logan, N.E.X.T. 02. In addition to this he also creates some stories of Kylion for Disney Italy.

In 2007 he began writing a new Italian Spider-Man series, supervised by Panini Comics and Marvel. Also in 2007 he entered the finalist of the Mondadori Junior Award with a project of horror novels for children conceived with Alberto Ostini and Giancarlo Olivares. From June of the same year, on behalf of Sergio Bonelli Editore, he created, together with his colleagues Luca Enoch and Giuseppe Matteoni, the comic novel Dragonero, the first of a new series entitled Romanzi a comic Bonelli and transformed into a regular series of the same name, again by Vietti and Enoch, starting from June 2013.

Together with Giancarlo Olivares and Marco Checchetto he founded the VOC Studio with the intention of starting various projects.

On 7 October 2014, his first prose novel was published by the Mondadori publishing house, entitled Dragonero - The curse of Thule, inspired by the comic series of the same name.