Brave sons of the king, twin brothers Jaroslav and Jaromír love and help each other. It was they and another brother - Jindrich, who once saw the portrait of Princess of Diamond Mountains, fell in love and went on her quest.
Unfortunately the movie The Third Prince is not yet available on HBO Max.
| Directing | Antonín Moskalyk | Director |
| Directing | Vít Horálek | Assistant Director |
| Writing | Ota Hofman | Story |
| Crew | Eva Kubesová | Script |
| Writing | Stanislav Rudolf | Creative Producer |
| Writing | Karel Jaromír Erben | Book |
| Camera | Jiří Zavřel | Assistant Camera |
| Camera | Miroslav Jirsa | Still Photographer |
| Directing | Vladimír Zelenka | First Assistant Director |
| Art | Milan Nejedlý | Production Design |
| Art | Boris Moravec | Assistant Production Design |
| Production | Václav Dobeš | Unit Production Manager |
| Camera | Pavel Dosoudil | Camera Operator |
| Art | Eva Slívová | Set Decoration |
| Crew | Ilona Přívětivá | Stunt Double |
| Crew | Cyril Neumann | Stunt Double |
| Sound | František Belfín | Conductor |
| Writing | Ota Hofman | Screenplay |
| Costume & Make-Up | František Pilný | Makeup & Hair |
| Editing | Zdeněk Stehlík | Editor |
| Crew | Marcela Pittermannová | Dramaturgy |
| Sound | Karel Jaroš | Sound |
| Crew | Ilona Šťastná | Stunt Double |
| Art | Yvetta Kornová | Set Decoration |
| Costume & Make-Up | Zuzana Bursíková | Costumer |
| Production | Václav Petr | Unit Production Manager |
| Sound | Ivan Kurz | Original Music Composer |
| Costume & Make-Up | Libuše Pražáková | Costume Design |
| Costume & Make-Up | Ladislav Bacílek | Makeup & Hair |
| Production | Václav Rouha | Production Manager |
| Writing | Antonín Moskalyk | Screenplay |
| Costume & Make-Up | Petra Barochová | Costumer |
| Production | Zdeňka Černá | Unit Production Manager |
| Camera | Jiří Šámal | Director of Photography |
| Art | Jiří Matějka | Set Decoration |
| Costume & Make-Up | Zdena Prchlíková | Makeup & Hair |
| Production | Jana Hauserová | Assistant Production Manager |
