Kerstin Julia Dietrich is a German actress and voice artist based in Munich. She trained at the Theatre Academy in Munich and began her career performing in musical theater, taking on leading roles such as Sophie in Mamma Mia!. Her on-screen acting work includes a recurring role as Hanne Striebel in the German television series Lena Lorenz, a part she played from 2017 onwards. She also appeared in the HBO series Boardwalk Empire and had a speaking role in the film Black Dog, Red Dog, directed by James Franco.

In the field of voice acting, Dietrich is active in dubbing, providing the German voice for characters in both live-action and animated productions. Her dubbing work includes the role of Claudia in the series Interview with the Vampire and the voice of Draggle in the Hatchimals animated series.

Dietrich is also known for her voice work in German dubs of anime series. She voiced the character Kyouko Izanami in the German Simuldub of The Day I Became a God, which was produced by Violetmedia GmbH and directed by Christian Hanisch. She also provided the German voice for Honoka in the anime series Gleipnir. Another notable anime role is Taeko Sugawara in the German dub of Arifureta: From Commonplace to World's Strongest, a production also handled by Violetmedia GmbH in Munich.

Her work in anime dubs frequently involves collaborations with the Munich-based studio Violetmedia GmbH and the dialogue director Christian Hanisch, who directed the German versions for both The Day I Became a God and Gleipnir. Her other professional attributes include fluency in English and French, a soprano vocal range, and skills in various dance styles and stage combat.