- Approval of God: Suzanne Collins was the one who had Effie replace the character Fulvia in this film, loving Elizabeth Banks's performance. In the book Effie only appears briefly near the end, but Collins called the director and said "there's no way Effie can't be in the Mockingjay films".
- Author Existence Failure: The death of Philip Seymour Hoffman on February 2, 2014 caused rewrites on what would have been his two final scenes in Part 2.
- Billing Displacement: Jena Malone as Johanna Mason in Part 1 is billed above many characters who have way more screen time than she does. She essentially makes a glorified cameo at the end giving Katniss a quick smile, compared to characters like Beetee (who shows up often to discuss plans using his technological expertise), Cressida and her crewmembers (who stay with Katniss almost all the time to film the propos), or even Canon Foreigner Egeria (who acts as Snow's primary adviser).
- The displacement continues in Part 2, but this time, Johanna has more to do (as in, she finally manages to talk), slightly excusing her from this trope. However, this comes at the cost of more displacements by other characters like Mrs. Everdeen (not that she's supposed to be important, but she has exactly two lines here), Effie (appearing mainly in the denouement), and Beetee (same as Effie). All of them are credited above the members of the Star Squad (Boggs, Jackson, Cressida, Pollux, etc.) who are a part of Katniss' team and thus take up a sizable chunk of screen time.
- Breakaway Pop Hit: Subverted. Lorde's "Yellow Flicker Beat" was supposed to be the movie's hit song, but it barely cracked the Top 40 (nor did it do much better in many territories outside North America, except for Lorde's home turf of New Zealand - and Belgium!). "The Hanging Tree," which Jennifer Lawrence sings in the movie, unexpectedly shot to the top of iTunes upon its release, becoming a #12 hit for Lawrence & composer James Newton Howard (it also did well internationally - perhaps unsurprisingly, one of the few countries where it lost out to "Yellow Flicker Beat" was New Zealand). It even got a pop radio remix that performed surprisingly well...
- Creator Backlash: Jennifer Lawrence doesn't think much of her singing voice, she dislikes 'The Hanging Tree' as a result.
- Dawson Casting: Katniss is still 17-year-old as these films take place a few months after Catching Fire, but Jennifer Lawrence continues to grow (23 years old at the time of filming). Same as Peeta (Josh Hutcherson, 21) and 19-year-old Gale (Liam Hemsworth, 23)
- Dyeing for Your Art: Natalie Dormer shaved half her hair to play Cressida (and apparently Jennifer Lawrence didn't believe she would do so).
- Enforced Method Acting:
- Francis Lawrence made use of the close real-life relationship between Jennifer Lawrence and Josh Hutcherson, and Jennifer's vocal displeasure with Josh being absent for most of the shoot. All of Peeta's interview segments were shot and edited before they shot the scenes where Katniss sees them, and they actually played the interviews for Jennifer and Liam Hemsworth during the takes to get the right emotional response from her.
- Jennifer Lawrence trolled Liam Hemsworth by only eating fish and foods with garlic before their kissing scenes, thus helping with the general awkwardness.
- Fake American: Several. Liam Hemsworth and Stef Dawson (both Australians), Paula Malcolmson (Northern Irish), and Sam Claflin (English) as Gale, Annie, Mrs. Everdeen, and Finnick, respectively, are carried over from the previous films. The films also introduce Natalie Dormer and Sarita Choudhury (both English) as Cressida and Egeria, respectively.
- In Memoriam: Part 1 was dedicated to Philip Seymour Hoffman.
- Non-Singing Voice: Averted. Not only is that really Jennifer Lawrence singing "The Hanging Tree" onscreen (and again over the closing credits), she had a bigger hit with the song than Lorde did with the movie's official single "Yellow Flicker Beat" (in Lorde's home country of New Zealand, where she peaked at #9 while Lorde got to #4, but Lorde peaked at #34 in the US and #71 in Britain while Jennifer made the top 20 in both countries - and even got to #1 in a couple of territories!). She also performs "Deep In The Meadow" at the end of the second part, which is the only song in the movie.
- The Other Marty: Lily Rabe was cast as Commander Lyme, but had to back out of the second film due to theatre commitments. Her scenes for the first film were cut, and Gwendoline Christie replaced her for the second.
- Real-Life Relative: Jennifer Lawrence's nephews play her and Peeta's children at the end.
- So My Kids Can Watch: Julianne Moore's two children were fans of the book, and convinced her to sign on to play Alma Coin.
- Those Two Actors:
- Throw It In!:
- Natalie Dormer improvised most of Cressida's directions to the twins and Finnick when his speech is being filmed, citing inspiration from how the film's director did so. She ad-libbed a lot of her other scenes too.
- Woody Harrelson and Elizabeth Banks ad-libbed Haymitch and Effie's kiss, shocking everyone on set.
- What Could Have Been:
- Jodie Foster was strongly considered for Alma Coin before Julianne Moore was cast.
- The ending to Part 1 was meant to be the opening of Part 2. The original ending was to be when Boggs knocks Peeta out and the movie fades to black. It was felt that was too big of a cliff hanger.
- Part 1 was going to open with a scene where Peeta would tell President Snow that he doesn't support the rebellion or Katniss's role in it (not knowing about the atrocities committed by Snow yet).
- Katniss' last goodbye to Gale was initially way harsher, with her coldly telling him to Get Out!. The director felt it was the wrong note to end their relationship on, so they softened it just a tad, but with the same message intact.
- Plutarch Heavensbee was supposed to talk to Katniss after the latter kills Coin. It didn't happen due to the aforementioned Author Existence Failure.
Trivia / The Hunger Games: Mockingjay