Julien Chatelet is a French actor and voice artist, born in 1977 in Boulogne-Billancourt, recognized for his extensive work in dubbing for film and animation. He began his career with a foundation in theater, having trained at the Franco-American Film and Theatre school and later with renowned teacher Jean-Laurent Cochet. Before becoming a prominent voice in animation, he was known to French television audiences for his role as Lieutenant Antoine Portal in the long-running series Les Cordier, juge et flic.

Chatelet's voice acting career spans a wide range of anime, where he is frequently cast to portray powerful, deep-voiced characters. He is best known as the definitive French voice of All Might (Toshinori Yagi) in the worldwide hit My Hero Academia, a role he has reprised across all seasons of the series and its animated films, including Two Heroes, Heroes Rising, and World Heroes' Mission. His association with long-running series is a hallmark of his career; he is also the voice of Elfman Strauss in Fairy Tail, a role he has played for years across the main series and its film adaptation.

His filmography demonstrates his versatility and frequent presence in major anime franchises. In Fairy Tail alone, he has voiced multiple characters, including Acnologia and Jacob Lessio, in addition to Elfman. He is the voice of Thors and L'oreille in Vinland Saga. His other notable anime roles include Batte Man in One Punch Man, Kershner in Sirius the Jaeger, Isamu Tamaru in Kotaro Lives Alone, Nanato Mukaido in Platinum End, Maître du jeu in I'm Standing on 1,000,000 Lives, Fujimaki in Megalobox, and Koichiro Mutō in Japan Sinks: 2020. In the world of film, he voiced Libertus Ostium in the CGI feature Kingsglaive: Final Fantasy XV and Jack in the acclaimed film Patema Inverted. His earlier work includes voicing the beloved character Pierre in the Pokémon film Jirachi Wish Maker.

Beyond anime, Chatelet's voice is heard across various genres, including live-action dubbing for actors such as Louis Lombardi and Josh Brener. In an interview regarding his long-standing role as All Might, he discussed the challenges of voice acting, noting the intense vocal demands of the character and the adaptation process involved in making a role resonate with a French audience while respecting the original work. He has also participated in fan conventions, such as the Paris Manga & Sci-Fi Show, engaging with audiences and sharing insights into the art of dubbing.