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Evgeni Leonov as Semyon the postman (voice) |
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Nina Solomatina as Ksyusha / Ksyusha's older sister (voice) |
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Vyacheslav Nevinnyy as Fisherman (voice, uncredited) |
| Writing | Yuri Yakovlev | Writer |
| Directing | Vladimir Pekar | Director |
| Sound | Evgeniy Krylatov | Original Music Composer |
| Art | Tatyana Kolusheva | Art Direction |
| Camera | Kabul Rasulov | Director of Photography |
| Sound | Boris Filchikov | Sound Director |
| Visual Effects | Marina Rogova | Animation |
| Visual Effects | Natalya Bogomolova | Animation |
| Visual Effects | Vladimir Shevchenko | Animation |
| Visual Effects | Viktor Likhachov | Animation |
| Art | Sofia Mitrofanova | Storyboard Artist |
| Art | Sergey Marakasov | Storyboard Artist |
| Art | Irina Svetlitsa | Storyboard Artist |
| Art | Elena Tannenberg | Storyboard Artist |
| Writing | Pyotr Frolov | Script Editor |
| Directing | Lidiya Nikitina | Assistant Director |
| Art | Roza Bikmaeva | Assistant Art Director |
| Camera | Lyudmila Krutovskaya | Assistant Camera |
| Editing | Nataliya Stepantseva | Editor |
| Production | Fyodor Ivanov | Producer |
| Sound | Valentina Tolkunova | Playback Singer |
