Klaus Vaux is an American voice actor, ADR director, and audio engineer known for his extensive work in English-language dubs of Japanese anime, primarily for ADV Films and Funimation. Klaus Vaux is a professional alias for Charles Clinton Campbell, who was born on November 16, 1968, in Houston, Texas.

Campbell began his career in the anime industry as ADV Films' first in-house ADR audio engineer, working on classic dubs such as Neon Genesis Evangelion, Blue Seed, and Golden Boy. In 1998, he relocated to Austin, Texas, to establish and manage ADV's Monster Island Studios. He made his directorial and scriptwriting debut with the series Lost Universe in 2000. Over his career, he has also worked under other aliases, including Charlie Campbell, Clint Campbell, Smokey Delange, and Winston Parish.

As a voice actor operating under the name Klaus Vaux, he has contributed to a wide array of anime series. He is known for voicing Dr. Hamilcar Barcas in Guyver: The Bioboosted Armor. His other notable roles include Mana Walker in D. Gray-man, Chairman Kurihara in Prison School, Wakaba Mine in Fairy Tail, the Narrator in Golden Boy, and Edward Rutherford in Unbreakable Machine-Doll. He has also voiced characters in major franchises such as One Piece, Dragon Ball Z: Resurrection F, and Fullmetal Alchemist: Brotherhood.

In addition to voice acting, Campbell has had a significant behind-the-scenes career as a producer, script adapter, and voice director. His directorial credits include the English dubs for Lost Universe, Science Ninja Team Gatchaman, and the Rurouni Kenshin: New Kyoto Arc. As an engineer, he worked on the audio production for numerous series, including the seminal dub of Neon Genesis Evangelion.