Zahia Ziouani, 17, dreams of becoming a conductor, while her twin sister Fettouma hopes to be a professional cellist. They want to make classical music accessible to everyone and create their own orchestra.
| Actor | Role |
|---|---|
 Oulaya AmamraZahia Ziouani | Zahia Ziouani |
 Lina El ArabiFettouma Ziouani | Fettouma Ziouani |
 Niels ArestrupSergiu Celibidache | Sergiu Celibidache |
 Zinedine SoualemAbdel Ziouali | Abdel Ziouali |
 Nadia KaciMme Ziouali | Mme Ziouali |
| LLaurent CiradeClaude Burgos | Claude Burgos |
| MMartin ChapoutotDylan | Dylan |
| LLouis-Damien KapferLambert Lallemand | Lambert Lallemand |
 Salomé DesnouesPauline | Pauline |
| AAurélien CarbouGabriel | Gabriel |
| LLéonard LoufAntoine | Antoine |
 Jonas Ben AhmedMalick | Malick |
| VVictor BurgardVictor | Victor |
 Blandine LaignelBlandine | Blandine |
| LLouise LegendreMarie | Marie |
| MMartin GillisKevin | Kevin |
| AAdèle ThéveneauAgathe | Agathe |
| RRémi LecomteBertrand | Bertrand |
| EEmmanuel CoppeyMartin | Martin |
 Benoit Del GrandeKarl | Karl |
| DDarline Saint-FélixGaëlle | Gaëlle |
| TTifenn GiraudeauJulie | Julie |
| AAdèle GalClaire | Claire |
| IIsabelle ConanLa jeune fille trisomique | La jeune fille trisomique |
| VValentin ThierryValentin | Valentin |
 Ambre MuniéCaroline | Caroline |
| BBarbara SollerAriane | Ariane |
| PPierre XifarasPierre | Pierre |
| LLeila HilmiClara | Clara |
| FFélicien GarciaBenoit | Benoit |