 At the age of eight months, Ohrner began as a child model, appearing in print advertorial campaigns for baby carriages, margarine and detergent, and by the age of four, he was appearing in television commercials.In 1969, Ohrner made his television debut at the age of four, guest-starring in an episode of the television crime drama, "Der Kommissar" and in 1970, he made his feature film debut appearing as "Bübchen" in the romantic comedy "".He followed up with small roles in the comedy films "" and "", and in 1973, he appeared alongside his sister Carolin in the dramatic television movie "Nicht einmal das halbe Leben".