The original French language version, which translates literally as Jack and the Mechanics of the Heart, was released in October 2013, with English-, German-, Finnish- and Spanish-language versions following in 2014.
The skeletons' band is named "Dionys-Os" as a joke ("os" means "bones"); the real band "Dionysos" made the music of this movie, Mathias Malzieu being the singer of the band.
Mathias Malzieu is the singer of the band "Dionysos"; many people involved in this movie are also singers or musicians.
The film was originally set to be released on 17 October 2012 in France but was delayed until October 2013 by unknown reasons.
This film includes a moon with a face, a sun with a face and arms, and a train that flies into the sky, which are probably references to the real-life Georges Méliès's early film works.