Müller studied Modern German Literature, Medieval Studies and Media Studies at Heinrich Heine-Uni in Düsseldorf (Magister Artium 1996).
Subsequently and to date, he has attended numerous seminars on film writing by Christopher Vogler, Robert McKee, Felix Huby, Bernd Eilert, Detlev Buck and Jurgen Wolff, among others, including Bobette Buster's seminar "The Art of Screen Storytelling" (Peter Stark Program, USC, Los Angeles) and the Billy Wilder Institute's Writer/Producer Program (Columbia College and USC, Los Angeles).
Since 1997, Müller has been a series, show and comedy writer, since 2003 also in a team with Patricia Eckermann (antagonisten.de).
Productions for which Müller wrote have been awarded the German Television Prize, the German Comedy Prize, the Grimme Prize, and many more.
Müller has also written and continues to write radio plays, novels and non-fiction. His latest novel "Allerseele" (2020) was nominated for the German Selfpublisher Book Award 2021. His current youth novel "Musa-Chroniken I - Die weiße Bruderschaft" was published in the summer of 2022.