- Acclaimed Flop: This was a well reviewed, much enjoyed movie... which didn't do so hot at the box office.
- Actor-Inspired Element: Clive Owen actually contributed a lot to the final draft of the script, providing Alfonso Cuaron with some insights.
- Approval of God: The author of the novel loved the finished film and even made a cameo at the beginning.
- Camera Abuse: Used frequently to add to the gritty visual style. For the last Epic Tracking Shot featured in the film the production crew had a perfect take, only to notice that blood had spattered on the lens. The cinematographer convinced the director to use the take anyway.
- The Danza: Almost: Julianne Moore as "Julian."
- Dueling Movies: With V for Vendetta: both social sci-fi adaptations of British fictional works set 20 Minutes into the Future under repressive regimes. Children of Men did garner better reviews and even a couple Oscar nominations.
- Fake Nationality:
- Nigel, a Briton like most of the characters, is played by American actor Danny Huston.
- Possibly. Marichka is played by a Romanian actress Oana Pellea and her lines are all in Romanian - but those are mostly ad-libbed. The name Marichka is Russian and there's a medal of Lenin visible in her house - so she's likely meant to be Russian.
- Saved from Development Hell: Alfonso Cuarón was attached to the movie in 2001, and took a while to actually start production, even making another movie in-between.
- Shrug of God: It's been stated that the ending was deliberately designed to appear to be either a hopeful or Downer Ending, depending wholly on where you lie on the Sliding Scale of Idealism vs. Cynicism.
- In-story its wholly unclear whether or not Kee and the child will survive, but as the credits start to roll we hear the sound of children playing and laughing, as opposed to the stark silence the film began with. It's pretty clear that this is a hint that hope will return to the world, and more children will be born.
- Throw It In!: The scene where blood splashes on the lens? Alfonso Cuaron actually called "cut" when that happened, but his voice was drowned out by the explosions. The cinematographer loved the shot and convinced him to leave it in.
- Too Soon: The opening attack in Fleet Street was filmed only two weeks after a real terrorist attack had happened in London.
Trivia / Children of Men