Matthias Klie is a German actor and voice actor born in 1961 in Lüdinghausen. He has been active in the German dubbing industry since 1984, lending his voice to numerous characters in film and television. His voice acting career is underpinned by a foundation in stage and on-camera acting, as well as formal training in classical singing and musical performance, skills he honed under the guidance of esteemed voice actors Maria Körber and Joachim Kerzel.

Klie is particularly well-known for his extensive work in anime, where he has voiced a wide array of characters. His most prominent and long-running role is that of James, the male member of the bumbling Team Rocket trio, in the German adaptation of the Pokémon anime. He has provided the voice for this character for over two decades, appearing in numerous television series episodes and theatrical films, including Pokémon the Movie: The Power of Us, Pokémon the Movie: Secrets of the Jungle, and Mewtwo Strikes Back Evolution.

Beyond Pokémon, Klie has taken on many other significant roles in anime series and films. He voices the powerful swordsman Kojirou Sasaki in Record of Ragnarok and the aristocrat Aubeste Meletes in Record of Grancrest War. In the One Piece franchise, he is the German voice of the legendary swordsman Dracule Mihawk, appearing in specials like One Piece 3D2Y: Overcoming Ace's Death! Luffy's Pledge to His Friends, as well as the character Kumadori. His repertoire also includes the mentor figure Kratos Aurion in Tales of Symphonia the Animation, the rival Yuuri in Megalobox, and Sir Nighteye in My Hero Academia. Other notable credits include roles in Ghost in the Shell: Stand Alone Complex: Solid State Society, Children Who Chase Lost Voices from Makoto Shinkai, and Human Lost.

Klie's work in dubbing extends beyond animation to include live-action film and television. He is widely recognized as the official German dubbing voice for Danish actor Mads Mikkelsen, voicing him in series such as Hannibal and films like Doctor Strange and the Fantastic Beasts franchise. He also dubs Mikkelsen's brother, Lars Mikkelsen, and has voiced actors such as Nick Offerman in Parks and Recreation and Titus Welliver in Bosch. He has also appeared as an on-screen actor in German television productions like the series Marienhof.