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 | Dmitry Fiks | Producer |
| Camera | Dmitry Shlykov | Director of Photography |
| Writing | Anna Sobolevskaya | Screenplay |
| Production | Alexandr Nikolaev | Producer |
| Art | Igor Tryshkov | Production Design |
| Production | Anna Kurbatova | Producer |
| Production | Mikhail Kurbatov | Producer |
| Directing | Aleksandr Galibin | Director |