Leonard Grobien was born with glass bones in 1998 and trained as a screenwriter at the International Film School Cologne (ifs). He has realised several short films as an author and filmmaker. In the film »Special« (2021), he impressed as an actor and director. He deepened his acting work in the leading role of Fynn in the film »Was wir wollen« (2022). The film directed by Elena Weiß won prizes at various festivals in 2023. In 2023, Leonard appeared in front of the camera as the character Mesut in the feature film »Der Wald in mir« (directed by Sebastian Fritsch). In the same year, he made his debut as a stage actor in the play »Die vielen Stimmen meines Bruders«, a co-production of Schauspielhaus Wien, Kunstfest Weimar and Kosmos Theater Wien directed by Marie Bues.

In 2019, Leonard hosted the YouTube channel »100 percent me« by FUNK, which was nominated for the Grimme Prize.