Wolfgang Riehm is a German actor, voice actor, and narrator born in 1954 in Münster, Germany. He completed his acting training at the Hamburgisches Schauspielstudio under Hildburg Frese from 1980 to 1983, with additional instruction from Annemarie Marks-Rocke. Riehm began his stage career with engagements at the Schleswig-Holsteinischen Landestheater and the Saarländischen Staatstheater before working extensively at Hamburg venues including the Thalia Theater, Ernst-Deutsch-Theater, Altonaer Theater, and Theater in der Basilika. His on-screen acting credits include appearances in German television series such as Tatort, Ein Fall für zwei, Ritas Welt, Großstadtrevier, Alarm für Cobra 11, Notruf Hafenkante, and Sturm der Liebe. Riehm has worked as a voice actor since 1986, providing German dubbing for numerous film and television roles, as well as voice work for documentaries, commercials, audio dramas, and video games.

Within anime voice acting, Wolfgang Riehm is known for several significant roles in major series. He voices Inoichi Yamanaka, the father of Ino Yamanaka and a key member of the Konohagakure intelligence division, across the Naruto franchise. He provides this character's German voice in the original Naruto series, Naruto Shippuden, the film Road to Ninja: Naruto the Movie, and the sequel series Boruto: Naruto Next Generations. Riehm also voices the character Kimimaro Kaguya in Naruto as the character's third German voice actor. In the Gintama franchise, Riehm performs the role of Henpeita Takechi, a radical imperialist and leader of the Kiheitai faction. He voices this character in the Gintama television series as well as in the film Gintama: The Movie, providing continuity for the role across different productions. Additional anime roles include Abdul in Mobile Suit Gundam Wing and Mobile Suit Gundam Wing: Endless Waltz, Aoki in The Irregular at Magic High School, Death Spot in Grimgar, Ashes and Illusions, Jeff in Emma: A Victorian Romance, Tony Shigeru and Nobuo Kaneko in Kabukicho Sherlock, Torrid Magic in I'm in Love with the Villainess, and the characters Warthog and Porcupine in Sherlock Yack: Zoo Detective.

Riehm has developed recurring voice acting partnerships with several Japanese actors for their German dub voices. He is the regular German voice for Daiki Nakamura, providing the voice for Nakamura's character Inoichi Yamanaka across multiple Naruto productions. He also regularly dubs the roles of actor Andy Kindler, including the character Mort in Bob's Burgers and the film Bob's Burgers: The Movie. His collaborations include providing German voices for Toshiyuki Morikawa as Abdul in the Gundam Wing series and as Kimimaro Kaguya in Naruto.

Among his notable achievements, Riehm has maintained consistent roles across long-running franchise productions, particularly voicing Inoichi Yamanaka from the early episodes of Naruto through the continuation in Boruto: Naruto Next Generations, demonstrating longevity within a major anime series. His work on the Gintama film as Henpeita Takechi represents his involvement in theatrical anime releases, while his performance in Mobile Suit Gundam Wing connects him to one of the most recognized mecha anime franchises. Beyond anime, Riehm's voice acting work spans live-action productions including Yellowstone, Bob's Burgers, and various film dubs, indicating a versatile career across multiple genres and media formats.