- "Hang on to your fronds, Planty. We're going to save Lucy! And all the other people who are captured."
- ―Emmet to Planty
On February 3, 2014, Jared Stern was hired to write a sequel, along with Michelle Morgan. On February 21, 2014, it was announced that the sequel was scheduled to be released on May 26, 2017. On March 12, 2014, Deadline reported that co-editor Chris McKay will direct the sequel with Lord and Miller as producers. Warner Bros. did not invite co-producer Village Roadshow Pictures to return as a participant in the sequel because the film will be produced in Vancouver, VRP will be replaced by a Canadian studio with a similar occupation. On April 10, 2014, it was reported that director Chris McKay wants more women in the sequel than men. On July 28, 2014, it was reported that Chris Pratt wants to return to reprise his role of Emmet. In October 2014, Warner Bros. scheduled The LEGO Batman Movie, a spin-off starring Batman for 2017, which moved The Lego Movie Sequel to 2018. Will Arnett is set to return to voice Batman, while Chris McKay, who was earlier attached to the sequel, will direct the film which is being written by Seth Grahame-Smith and produced by Roy Lee, Dan Lin, Phil Lord, and Chris Miller. On April 20, 2015, Warner Bros. scheduled The LEGO Batman Movie, for a February 10, 2017 release date and The LEGO Movie 2 for a 2018 release. On October 25, 2014, it was reported that Phil Lord and Chris Miller had signed to write The LEGO Movie sequel instead of Jared Stern and Michelle Morgan. The writers have implied that the sequel will take place four years after the events of the first film. In February 2015, Warner Bros. announced that the title of the sequel had been changed to The LEGO Movie Sequel and that Rob Schrab replaced McKay as director since McKay went on to direct The LEGO Batman Movie. According to an interview at the Santa Barbara Film Festival, the sequel will also introduce Emmet's sister. On April 20, 2015, Warner Bros. scheduled The Lego Movie Sequel for a May 18, 2018 release date. On June 17, 2016, the film's release was delayed to February 8, 2019. On July 8, 2016, Warner Bros. hired Raphael Bob-Waksberg to rewrite the script.. On February 3, 2017, it was announced that Mike Mitchell would direct the film since Rob Schrab left due to "creative differences." On September 14, 2017, it was announced that Phil Lord and Chris Miller were in the process of rewriting the script and that the movie will deal with gender issues with regards to how boys play versus how girls play. On March 23, 2018, it was announced that Tiffany Haddish would be joining the cast of the film.
On May 21, 2018, the name of the film was officially revealed as The LEGO Movie 2: The Second Part. A teaser image with the logo was also revealed.
On June 4, 2018, a teaser poster was revealed. On June 5, 2018, the official teaser trailer was released.
“The LEGO Movie 2: The Second Part” reunites the heroes of Bricksburg in an all-new action-packed adventure to save their beloved city. It’s been five years since everything was awesome and the citizens are facing a huge new threat: LEGO DUPLO® invaders from outer space, wrecking everything faster than they can rebuild. The battle to defeat them and restore harmony to the LEGO universe will take Emmet, Lucy, Batman, and their friends to far away, unexplored worlds, including a strange galaxy where everything is a musical. It will test their courage, creativity, and Master Building skills, and reveal just how special they really are.
- Chris Pratt as Emmet and Rex Dangervest
- Elizabeth Banks as Wyldstyle/Lucy
- Will Arnett as Batman
- Tiffany Haddish as Queen Watevra Wa'Nabi
- Stephanie Beatriz as General Sweet Mayhem
- Charlie Day as Benny
- Alison Brie as Ultrakatty
- Nick Offerman as Metalbeard
- Jason Sand as Finn
- Graham Miller as Young Finn
- Brookyln Prince as Bianca
- Maya Rudolph as Mom, Dorothy Gale
- Will Ferrell as President Business, "The Man Upstairs"
- Richard Ayoade as Ice Cream Cone
- Channing Tatum as Superman
- Jonah Hill as Green Lantern
- Cobie Smulders as Wonder Woman
- Jason Momoa as Aquaman
- Margot Robbie as Harley Quinn, Susan, Mermaid, Wonder Woman Mini-Doll, Panda
- Ike Barinholtz as Lex Luthor
- Ralph Fiennes as Alfred Pennyworth
- Will Forte as Abraham Lincoln
- Bruce Willis as Himself
- Ben Schwartz as Banarnar
- Jimmy O. Yang as Zebe
- Noel Fielding as Balthazar
- Jorma Taccone as Larry Poppins
- Gary Payton as Himself
- Sheryl Swoopes as Herself
- Todd Hansen as Gandalf, The Swamp Creature
- Liam Knight as Sewer Babies
- Doug Nicholas as Chainsaw Dave
- Mike Mitchell as Mrs. Scratchen-Post, Guard, Eight the Octopus, Harmony Town Citizen, Announcer, Apocalypseburg Warrior
- Chris Miller as Chad, Chocolate Bar, Horse, Paperboy, Plantimals
- Emily Nordwin as Cleopatra
- Chris McKay as Larry the Barista
- Trisha Gum as Velma Dinkley
- Ryan Halprin as Dolphin Clock
- Phil Lord and Chris Miller are not directing this one like the first one. Instead, they are producing it and writing it.
- Seanne Winslow is not producing the film like the first one.
- It was supposed to come out in May 2017, but The LEGO Batman Movie took its 2017 spot.
- Like The LEGO Movie, the film uses CGI animated bricks to look like a stop-motion film.
- Chris McKay was originally supposed to direct until he left to work on The LEGO Batman Movie.
- Rob Schrab was originally supposed to direct until he left due to "creative differences."
- This film marks the first of a few things:
- Harley Quinn and Alfred Pennyworth's second appearances in a LEGO theatrical film after The LEGO Batman Movie.
- Puppycorn's first appearance in a LEGO theatrical film, as Unikitty's dream during the song "Not Evil" pays as a homage to her TV series.
- The first LEGO theatrical film to have its title appear at both the beginning and the end.
- The first LEGO theatrical film in which the main antagonist dies.
- With 13 minutes of end credits, this has the longest running time of end credits for a non-Disney animated film.
- It also has the second longest running time of end credits for an animated film in general after 2018's Disney sequel Ralph Breaks the Internet.
- Although both Vitruvius and Scribble Cop returned from The LEGO Movie, they only had minor non-speaking cameo roles (Vitruvius screamed after accidentally being knocked aside by Metalbeard at the very beginning of the movie and Scribble Cop growled at Emmet in response to greeting him during the "Everything Is Awesome [Tween Dream Remix]" scene).
- With the running time of 107 minutes long, this is currently the longest LEGO film to date.
- There two reference to The LEGO Ninjago Movie:
- ↑ Warner Bros. Already Working on Sequel to ‘The Lego Movie’ (Exclusive)
- ↑ The LEGO Movie Sequel is Officially Set for May 26, 2017!
- ↑ Warner Bros Builds ‘Lego’ Sequel With Chris McKay Directing
- ↑ 'Lego Movie' Backer Village Roadshow Cut Out of Sequel (Exclusive)
- ↑ Lego Movie Sequel Director Regretful Original Film Fails Bechdel Test, Wants to Do Better
- ↑ Chris Pratt: 'I'd love to return for Lego Movie sequel'
- ↑ WB Announces 10 DC Comics Movies, 3 ‘Harry Potter’ Spinoffs and ‘Lego’ Sequels
- ↑ Warner Bros.’ DC Comics Movie Slate Fully Revealed!
- ↑ 'Lego Batman' Spinoff Movie in the Works at Warner Bros. (Exclusive)
- ↑ 'The Lego Batman Movie' Gets Release Date
- ↑ ‘Lego Movie’ Sequel Gets Phil Lord, Chris Miller Script Commitment
- ↑ Phil Lord And Chris Miller On The Upcoming Lego Movies
- ↑ The LEGO® Movie Sequel - New director revealed
- ↑ LEGO Batman Movie Gets Release Date
- ↑ Everything Is Not Awesome: ‘The LEGO Movie Sequel’ Gets a Major Release Date Delay
- ↑ ‘Lego Movie Sequel’ Getting Rewrite From ‘BoJack Horseman’ Creator (EXCLUSIVE)
- ↑ "'Lego Movie' Sequel Enlists 'Trolls' Director Mike Mitchell (Exclusive)"
- ↑ "Exclusive: ‘The LEGO Movie 2’ to Tackle Gender Differences; Lord & Miller Rewriting the Script"
- ↑ Tiffany Haddish to Star in ‘The Lego Movie’ Sequel
- ↑ The LEGO Movie 2 on Twitter: Prepare for the second part. #TheLEGOMovie2
- ↑ The LEGO Movie 2 on Twitter: They come in pieces. New trailer TOMORROW. #TheLEGOMovie2
- ↑ First Trailer for ‘The LEGO Movie 2’ Confirms That Everything Is Still Awesome