Trivia[]
- The second Illumination film to be based on a Dr. Seuss book, after The Lorax (2012), and the first film to be scored by Danny Elfman.
- The film was originally going to be released on November 10, 2017, but it was changed to November 9, 2018.
- This marked the second film to be based on How the Grinch Stole Christmas!, after the 2000 live-action film starring Jim Carrey.
- This is the first Illumination Christmas film.
- This is Illumination's first film to be released in November.
- The third Dr. Seuss animated film, after Horton Hears a Who! and The Lorax.
- The second Dr. Seuss animated film to be rated PG by the MPAA, after The Lorax.
- This is the first Dr. Seuss film to be shot in the 2.35:1 aspect ratio, unlike the previous Dr. Seuss films that were produced in 1.85:1.
- The second Illumination film to be shot in the 2.35:1 aspect ratio, after Despicable Me 3.