The story of the steel melter Martin Hoff, whose factory delegates him to a drama school, corresponds to the real life of the actor Manfred Krug. Like his (film) hero, Krug works as a steel melter, does artwork, sings and acts, and is sent to drama school. Like his hero, who behaves anarchically and conspicuously, Krug is soon expelled from school.
| Actor | Role |
|---|---|
 Manfred KrugMartin Hoff | Martin Hoff |
 Marita BöhmeOttilie Zinn | Ottilie Zinn |
 Heinz SchubertFelix Schnepf | Felix Schnepf |
 Fred MahrJens Krüger | Jens Krüger |
 Günter NaumannRaupenfahrer | Raupenfahrer |
 Fred DelmareAufsichtsbeamter | Aufsichtsbeamter |
| JJutta WachowiakSängerin / Schauspielschülerin | Sängerin / Schauspielschülerin |
| GGert AndreaeMatze Wind | Matze Wind |
 Peter SturmNot listed | Not listed |
 Carola BraunbockNot listed | Not listed |
 Gerd E. SchäferNot listed | Not listed |
 Werner LierckNot listed | Not listed |
| HHorst FriedrichNot listed | Not listed |
 Willi SchwabeNot listed | Not listed |
| WWilli NeuenhahnNot listed | Not listed |
 Rolf HerrichtNot listed | Not listed |
 Werner SenftlebenNot listed | Not listed |
| KKarl-Ernst SasseNot listed | Not listed |
| Fred DelmareNot listed | Not listed |
 Rolf RömerNot listed | Not listed |
 Hans Hardt-HardtloffNot listed | Not listed |