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 |
| Writing | Karel Jaromír Erben | Book |
| Writing | Stanislav Rudolf | Creative Producer |
| Directing | Vladimír Zelenka | First Assistant Director |
| Directing | Vít Horálek | Assistant Director |
| Crew | Eva Kubesová | Script |
| Writing | Ota Hofman | Story |
| Writing | Ota Hofman | Screenplay |
| Writing | Antonín Moskalyk | Screenplay |
| Crew | Marcela Pittermannová | Dramaturgy |
| Camera | Jiří Šámal | Director of Photography |
| Camera | Pavel Dosoudil | Camera Operator |
| Camera | Jiří Zavřel | Assistant Camera |
| Art | Milan Nejedlý | Production Design |
| Art | Boris Moravec | Assistant Production Design |
| Art | Yvetta Kornová | Set Decoration |
| Art | Jiří Matějka | Set Decoration |
| Art | Eva Slívová | Set Decoration |
| Costume & Make-Up | Libuše Pražáková | Costume Design |
| Costume & Make-Up | Petra Barochová | Costumer |
| Costume & Make-Up | Zuzana Bursíková | Costumer |
| Costume & Make-Up | František Pilný | Makeup & Hair |
| Costume & Make-Up | Ladislav Bacílek | Makeup & Hair |
| Costume & Make-Up | Zdena Prchlíková | Makeup & Hair |
| Editing | Zdeněk Stehlík | Editor |
| Sound | Karel Jaroš | Sound |
| Production | Václav Rouha | Production Manager |
| Production | Václav Petr | Unit Production Manager |
| Production | Zdeňka Černá | Unit Production Manager |
| Production | Václav Dobeš | Unit Production Manager |
| Production | Jana Hauserová | Assistant Production Manager |
| Camera | Miroslav Jirsa | Still Photographer |
| Sound | Ivan Kurz | Original Music Composer |
| Sound | František Belfín | Conductor |
| Crew | Ilona Přívětivá | Stunt Double |
| Crew | Cyril Neumann | Stunt Double |
| Crew | Ilona Šťastná | Stunt Double |
