The film was directed by Jonathan Judge (co-executive producer and primary director of The Really Loud House) from a teleplay written by Tony Gama-Lobo, Rebecca May, and The Really Loud House developer and co-executive producer Tim Hobert, based on a story conceived by Gama-Lobo and May.

The film stars Wolfgang Schaeffer, Jahzir Bruno, Lexi DiBenedetto, Eva Carlton, Sophia Woodward, Catherine Ashmore Bradley, Annaka Fourneret, Aubin Bradley, Mia Allan, Ella Allan, Lexi Janicek, August Michael Peterson, Jolie Jenkins, and Brian Stepanek, reprising their roles from the live-action series, with Gavin Maddox Bergman, Trinity Jo-Li Bliss, Mateo Castel, Nolan Maddox, and Kevin Chamberlin in supporting roles.

On Halloween, Lincoln Loud and his best friend Clyde McBride find themselves conflicted as they decide between trick-or-treating and the signature Loud Family Spooktacular or attending a Halloween party hosted by Xander Coddington, the cool new kid at school and social media influencer.

Lincoln and Clyde make the final decision to skip the Spooktacular and head to Xander's Halloween party, which disappoints his family.

[8][9] A Really Haunted Loud House was originally planned to premiere on October 6, 2023 on Nickelodeon and Paramount+, but was later rescheduled to September 28, 2023.