Acquired by Warner Independent Pictures at 2006 Sundance for $6 million.
At the 2006 Berlin Film Festival, director Michel Gondry told that the main location of the film is a house where he used to live 15 years ago.
Rhys Ifans was set to play the lead role. He worked with Michel Gondry on the first drafts of the script and came up with the name for the movie. He is thanked in the closing credits.
French Visa d'exploitation number 111715.
Michel Gondry didn't use any chroma keys in this film (excepts the one you see explicitly in Stephane TV), but he screened the FX sequence (already done before the shooting with step-by-step method) behind the actors, so that they could see it and not imagine it, which gives them a different way of playing their parts.
The song that Stephane writes for Stephanie is sung to the tune of "After Hours" by The Velvet Underground, which is also featured in the movie's trailer.
There are several references in this movie to Michel Gondry's various music videos. Carrying the piano up the stairs is a reference to his video for the artist Lucas's song "Lucas With the Lid Off" which features a very similar sequence. The dolls that Gael García Bernal pulls out of the desk during one of the Stephane TV sequences are from his video for Oui Oui's song "Les Cailloux". The White Stripes song in the soundtrack is a reference to the many videos Gondry has done for them. The giant hands in an early dream sequence are from the Foo Fighters' "Everlong" video. Stéphane's bed and porch are similar to those from Chemical Brothers' "Let Forever Be" video.
One of the people on the posters in the destroyed house with all the broken records is a young Vanessa Paradis.
Golden the Pony Boy is a reference to the novel ‘The Outsiders’. At one point in the novel someone tells the protagonist, Pony Boy, to stay golden.
The Smiths single How Soon Is Now? and The Cure's album Three Imaginary Boys can be seen on the wall above the head of Stephane's bed.