 Krystyna StypułkowskaJoanna Kossakowska | Joanna Kossakowska |
 Władysław KrasnowieckiProfessor Kossakowski | Professor Kossakowski |
 Franciszka Denis-SłoniewskaProfessor Kossakowska | Professor Kossakowska |
 Jerzy PrzybylskiJoanna's Uncle | Joanna's Uncle |
 Ignacy GogolewskiAndrzej Wroński, narzeczony Joanny | Andrzej Wroński, narzeczony Joanny |
 Tadeusz JanczarTadeusz Łokietek | Tadeusz Łokietek |
 Elżbieta CzyżewskaKrystyna | Krystyna |
| JJan GüntnerFilip | Filip |
 Wanda JarszewskaJoanna's Aunt (uncredited) | Joanna's Aunt (uncredited) |
| MMarian JastrzębskiBłażej (uncredited) | Błażej (uncredited) |
 Juliusz KalinowskiMarcin (uncredited) | Marcin (uncredited) |
 Ryszard KotysMan by the Cloakroom (uncredited) | Man by the Cloakroom (uncredited) |
| BBarbara MarszelWeronika Nowak (uncredited) | Weronika Nowak (uncredited) |
 Irena OrskaParty Guest (uncredited) | Party Guest (uncredited) |
| AAndrzej RauszMan putting up a Poster (uncredited) | Man putting up a Poster (uncredited) |
 Piotr SkrzyneckiCellar Party Member (uncredited) | Cellar Party Member (uncredited) |
| TTadeusz SzanieckiParty Leader (uncredited) | Party Leader (uncredited) |
 Mieczysław ŚwięcickiCellar Party Member (uncredited) | Cellar Party Member (uncredited) |
 Tadeusz Hoszowski(uncredited) | (uncredited) |