Animal Logic, who animated the prior four theatrical Lego Movies did not return to do the animation for the film, as it would be considered cheating on Warner Bros., despite Lego and Warner Bros. both sharing the rights to the original franchise. Instead, the animation was done at Pure Imagination Studios in Los Angeles, and Zebu Animation Studios in India. Both Pure Imagination and Zebu have previously recreated the style of the original film franchise through theme park attractions, PSAs, and Les Simpson (1989) episode "Brick Like Me (2014)".
Released the same year as Illumination's Moi, moche et méchant 4 (2024); coincidentally, both films have music by Pharrell Williams and are distributed by studios owned by Comcast (Universal Pictures and Focus Features, respectively). Additionally, "Happy", from Moi, moche et méchant 2 (2013), will be featured in the film.