When the mother and father of ten-year-old Lena and Marusya decide to get married, these two completely alien girls are forced to become sisters. Now they share one room, one class, friends, and most importantly, they are fighting for the attention of their parents. Each of them dreams of returning to their former life, and for this it is necessary to embroil adults.
Unfortunately the movie My Horrible Sister is not yet available on HBO Max.
| Production | Anna Kurbatova | Producer |
| Production | Dmitry Fiks | Producer |
| Production | Alexandr Nikolaev | Producer |
| Writing | Anna Sobolevskaya | Screenplay |
| Camera | Dmitry Shlykov | Director of Photography |
| Art | Igor Tryshkov | Production Design |
| Directing | Aleksandr Galibin | Director |
| Production | Mikhail Kurbatov | Producer |