Katja Brenner is a German actress and voice actor known for her work in film, television, theater, and synchronization. She was born on July 13, 1973, in Ansbach, Germany. Brenner trained as an actress at the Academy for Performing Arts in Ulm. Her professional profile lists her vocal range as a mezzo-soprano.

Brenner has an extensive career in live-action acting, with numerous credits in German television series and films. Her television work includes appearances on Tatort, SOKO Potsdam, Die Rosenheim-Cops, Um Himmels Willen, Der Alte, and Frühling, among many others. She has also appeared in international film productions such as the arthouse film Euphoria. Her stage work spans decades, with performances at theaters across Germany including the Metropoltheater Munich, Pathos Transport Theater, and the Ruhrfestspiele Recklinghausen.

As a voice actor, Brenner works in German dubbing. Her most notable anime voice role is Funifura in the 2023 series Konosuba: An Explosion on This Wonderful World, which is a spin-off of the popular Konosuba franchise. In this series, she provided the German voice for the character Funifura, originally voiced by Miyu Tomita, across multiple episodes.

Beyond her voice work in animation, Brenner's other synchronization credits include a role as a lawyer (Melinda Wade) in an episode of the television series Damages - Im Netz der Macht. She has also worked as a narrator and provided voice work for other projects, including the role of Narrator Frau Holle in the film Schau mich nicht so an. Her professional profile indicates she has been active as a speaker and voice actor for recording studios in Munich since 2003.