Pauline Brunner is a Swiss voice actress and director known primarily for her work in French dubbing for animated films and series. Her career is marked by a strong association with the character of Célestine, the little mouse protagonist from the Ernest et Célestine film franchise. She first voiced the role in the original 2012 film Ernest et Célestine. She subsequently reprised this voice role in the 2017 television series Ernest et Célestine, la collection, the 2017 short film Ernest et Célestine en hiver, and the 2022 feature film sequel Ernest et Célestine: Le Voyage en Charabie.

Beyond the Ernest et Célestine series, Brunner has extensive credits in the French-language versions of major animated productions. She has voiced characters in several Studio Ghibli films, including Sora Matsuzaki in From Up on Poppy Hill, Otsu in The Tale of the Princess Kaguya, and Sayaka in When Marnie Was There. Her work also includes voicing Nadia in the French adaptation of the Titeuf series. In 2024, she voiced the character Poppy Prescott in the French dub of Despicable Me 4.

In addition to her voice acting, Brunner has worked as a director in animation. She co-directed the documentary Miss Mermaid, which was in progress in 2019 and scheduled for release in 2026. She has also been involved in directing a stop-motion series for France TV éducation about disabilities. Her filmography shows recurring collaborations with director Jean-Christophe Roger on various Ernest et Célestine projects and with actor Lambert Wilson, who voices the character Ernest opposite her Célestine.