Trailer
| Jan Malaska as Frantík |
| Zdeněk Deyl as Pepík |
| Ivana Fišerová as Káťa |
| Dadulka Šimková as Alenka |
| Věra Machoňová as Špuntík |
| Josef Roubíček as Klučík |
| Hana Pařízková as Olinka |
| Eva Nedvědová as Evička |
| Vladimír Horka as Preclík |
| Liliana Martoni as Cácorka |
| Helena Lišková as Helenka |
| Miriana Raljičová as brýlatá Zuzka zvaná Zrzka |
| Václav Winter as Rudla |
| František Maxián as Karel (kluk s trumpetou) |
 | Karel Smyczek as kluk zvaný Chemik |
 | Josef Kemr as básník |
 | Eman Fiala as řidič Fiala |
 | František Filipovský as Velký revizor |
 | Josef Mixa as průvodčí Král, Pepíkův otec |
| Ladislav Gzela as výhybkář |
| Marcela Šilhánková as Preschool Teacher |
 | Lubomír Kostelka as zapisovatel |
| Vladimír Navrátil as fotoreportér |
 | Rudolf Pellar as profesor |
| Josef Příhoda as prodavač balonků |
| Otto Hofman |
 | Václav Voska as Narrator (voice) |
 | Jiřina Bohdalová as Preschool Teacher (voice) |
| Art | |
| Ivo Sýkora | Set Decoration |
Costume & Make-Up | |
| Eva Martincová | Costumer |
Production | |
| Věra Winkelhöferová | Unit Production Manager |
Writing | |
| Josef Kainar | Lyricist |
Camera | |
| Jan Novák | Director of Photography |
Writing | |
| Ota Hofman | Screenplay |
Costume & Make-Up | |
| Lída Novotná | Costume Design |
| František Novotný | Makeup & Hair |
Sound | |
| Svatopluk Havelka | Original Music Composer |
| Štěpán Koníček | Conductor |
Writing | |
| Ota Hofman | Story |
Sound | |
| Bohumír Brunclík | Sound Effects |
Art | |
| Vladimír Labský | Production Design |
Writing | |
| Ladislav Fikar | Creative Producer |
Camera | |
| Karel Hejsek | Camera Operator |
Directing | |
| Eva Kubesová | Assistant Director |
Costume & Make-Up | |
| Nita Romanečová | Costumer |
Directing | |
| Lada Vacková | First Assistant Director |
Sound | |
| Stanislav Vondraš | Sound |
Directing | |
| Boca Abrhámová | Assistant Director |
Crew | |
| Václav Nývlt | Dramaturgy |
Art | |
| H. Vrána | Set Decoration |
| Ladislav Rada | Set Decoration |
Editing | |
| Miroslav Hájek | Editor |
Production | |
| František Sandr | Production Manager |
| Vlastimil Maršálek | Unit Production Manager |
| Jaroslav Vokurka | Unit Production Manager |
Camera | |
| Jiří Štíbr | Assistant Camera |
Costume & Make-Up | |
| Karel Konrád | Makeup & Hair |
Production | |
| Bohumil Šmída | Executive Producer |
Directing | |
| Milan Vošmik | Director |
