Born in 2011, Jonathan Köhn began attending the BellAcademia Acting School in Cologne in 2020. He gained his first stage experience in 2023/24 at Cologne's Theater Tiefrot, performing in the children's plays "The Frog King Goes on Strike" and "A Midsummer Nightmare."

In the summer of 2023, Köhn appeared in front of the camera for the first time, taking on the lead role in Bernd Sahling's feature film "Ab morgen bin ich mutig" ("Tomorrow I'll Be Brave.") He plays a boy secretly in love with a classmate. The film premiered in the summer of 2025 at the Erfurt Children's Media Festival Goldener Spatz and was released in cinemas later that autumn.