- Actor-Inspired Element: Ellen Page came up with Juno's hairstyle and also did her own hair every day. She also suggested that Juno would be a fan of the music by Kimya Dawson and The Moldy Peaches.
- Awesome, Dear Boy: J. K. Simmons had this reaction when seeing the script. He joked he'd take the part of the teacher who has no lines, just to be involved with the film.
- California Doubling: Shot in Canada, starring two Canadian actors, but set in St. Cloud, Minnesota.
- Creator Backlash: Diablo Cody has gone on to state that she would not have written Juno in light of anti-abortion law Georgia House Bill 481, now that people perceive the movie as an anti-choice film.
- Dawson Casting: Ellen Page was twenty playing a sixteen-year-old. Michael Cera was nineteen.
- Fake American: See California Doubling.
- I Want You to Meet an Old Friend of Mine: Both Michael Cera (Paulie Bleeker) and Jason Bateman (Mark Loring) previously co-starred together as father and son on Arrested Development.
- Irony as She Is Cast: Jason Bateman plays a man who is reluctant to become a father, around the same time he welcomed his first child in real life.
- Old Shame: Ellen Page deeply regrets her line that the name Madison "sounds a little gay," having gotten a much deeper experience in how much words can matter since coming out of the closet.
- Reality Subtext: Juno says she wants the potential parent to be "cool, like a graphic designer." Ellen Page's father is a graphic designer.
- The Red Stapler: Juno caused what was, by all accounts, a staggering demand for hamburger-shaped phones. According to a New York Post article just after the film's release, burgerphone had a huge rise of 759% in a month.
- Star-Making Role: Ellen Page's Oscar nomination catapulted her to household name status.
- What Could Have Been:
- Diablo Cody's script originally called for Juno to say nothing and just burst into gut-wrenching sobs upon seeing Bleeker for the first time after she gives birth. Some think this would have been more emotional for the audience, as we fully see the reality of the situation crash down upon Juno. However, this might have been too emotional, and may have made the audience want to see Juno keep the baby instead of Vanessa. Or feel less like a resolution as we get much less of the feeling that Juno's going to be alright, which may have been why it was replaced with a more upbeat scene ("nice legs").
- The working title of the movie was 'Junebug' but Diablo Cody realised there was already another movie with that title, released two years earlier and also featuring a pregnancy.
- Word of Gay: According to Ellen Page, Juno, like her actress, eventually came out as a lesbian.
Trivia / Juno