Leonhard Mahlich is a German voice actor born on January 13, 1979, in East Berlin. He was born into a family of actors and voice actors, being the son of Holger Mahlich and Micaëla Kreißler, which led to him beginning his voice-over career at the young age of five. Beyond his voice work, Mahlich studied music in Los Angeles at the Musicians Institute and is also active as a musical author.

In the realm of anime and animation dubbing, Mahlich is known for several prominent roles. He was the first German voice for the character Shikamaru Nara in the long-running anime series Naruto and Naruto Shippūden, a role he voiced from 2006 to 2016. He also lent his voice to the character Rudo Bernstein IV in the 2018 fantasy anime series Lost Song. His work in anime films includes voicing Nash Gold Jr., the antagonist point guard, in the film Gekijōban Kuroko no Basuke Last Game.

Beyond these specific credits, Mahlich has a prolific career dubbing a wide array of live-action and animated content into German. He is particularly well-known as the regular German dubbing voice for actors such as Chris Pratt, Liam Hemsworth, and Kevin Hart. This extensive work includes voicing characters like Kristoff in the Frozen film franchise, Peter Quill / Star-Lord in the Guardians of the Galaxy films, and Mario in The Super Mario Bros. Movie.