Bolek, a young locksmith’s apprentice, fights off two suspicious men to defend a friend and, fleeing the police, hides at a party where guests mistake him for the wealthy but naïve Lolek.
| Actor | Role |
|---|---|
 Adolf DymszaLolo Charkiewicz / Bolek Cybuch | Lolo Charkiewicz / Bolek Cybuch |
 Antoni FertnerMister Brown | Mister Brown |
| JJanina WilczównaKrysia | Krysia |
| AAlina ŻeliskaMarysia | Marysia |
 Michał ZniczProfessor Morini | Professor Morini |
 Władysław GrabowskiJan | Jan |
 Andrzej BoguckiLolo's Mate | Lolo's Mate |
 Feliks ChmurkowskiLolo's Father | Lolo's Father |
 Maria ChmurkowskaLolo's Aunt | Lolo's Aunt |
| JJanina JaneckaNot listed | Not listed |
 Jerzy KobuszJanek | Janek |
 Zdzisław KarczewskiFranek | Franek |
| HHelena CaryNot listed | Not listed |
| MMieczysław WinklerNot listed | Not listed |
| JJadwiga BukojemskaNot listed | Not listed |
| JJózef ŚliwickiNot listed | Not listed |
| JJerzy RygierNot listed | Not listed |
| BBronisław RomaniszynNot listed | Not listed |
| AAmelia WołkońskaNot listed | Not listed |