Dennis Schmidt-Foß is a prolific German voice actor and dialogue director, born on August 5, 1970, in Aschaffenburg, Germany. He is considered one of the most in-demand and recognizable voices in the German dubbing industry, having begun his career at the young age of seven. His work is not limited to voice acting; he is also active as a dialogue book author and dialogue director.

Schmidt-Foß is perhaps best known to international audiences as the official German dubbing voice for a host of A-list Hollywood actors. He is the standard German voice for Ryan Reynolds, Chris Evans, John Cena, Freddie Prinze Jr., Joshua Jackson, Michael C. Hall, and, since 2007, Eddie Murphy. This extensive work in film and television forms the core of his professional reputation.

However, his career also encompasses a significant body of work in anime and animation. As specified, he voices the character Inosuke Hashibira in the German dubs of the hit anime series Demon Slayer: Kimetsu no Yaiba and its cinematic sequel, Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train. His anime credits also include the role of Eiri Yuki in Gravitation, Ryuuji Otogi (Duke Devlin) in Yu☆Gi☆Oh! Duel Monsters, Masao Horiki in Human Lost, Walter von Schönkopf in The Legend of the Galactic Heroes: Die Neue These, and Ken Kanzaki in Kikou Keisatsu Metal Jack. Beyond these, his voice can be heard in numerous animated productions, including the role of Kanan Jarrus in the Star Wars: Rebels and The Bad Batch animated series.

Schmidt-Foß comes from a family deeply rooted in the dubbing profession. His younger half-brothers, Gerrit and Florian Schmidt-Foß, are also voice actors, with Gerrit being particularly well-known as the German voice of Leonardo DiCaprio. Furthermore, he is married to Dascha Lehmann, a voice actress and the daughter of Manfred Lehmann, the iconic German voice of Bruce Willis, creating a notable dubbing dynasty. His long-standing career and his status as the default voice for multiple major international stars mark him as a central and highly influential figure in German-language media.