Romain Duris's sister is a pianist, and she is the one who taught him to play piano for this film.
The film's title comes from a line in French singer Jacques Dutronc's song, "La fille du père Noël" ("Santa Claus's daughter").
Thomas's headphones are Sony MDR-V300.
The laptop Tom uses to record his piano practice with is an Apple Titanium Powerbook G4 and his cell phone is a Samsung SGH S307.
Italian censorship visa # 99395 delivered on 11 November 2005.