The Undead King on February 25, The Dark Warrior on March 11

The "Overlord x Yōjo Senki Joint Press Conference" announced on Thursday that the compilation film project for the Overlord television anime will have two parts. Overlord: Fushisha no Ō (Overlord: The Undead King) will open on February 25, and Overlord: Shikkoku no Senshi (Overlord: The Dark Warrior) will open on March 11. (The films' titles are also the titles of the first two volumes in Kugane Maruyama's original Overlord light novel series.) The films will add new scenes, and original character designer (and original novel illustrator) so-bin drew rough drafts for new characters.

The musical group Myth & Roid is returning from the television series to contribute the theme music. The official website also posted the key visual (above) that so-bin drew for the first film.

The films will play at Kadokawa Cinema Shinjuku theater and Ikebukuro Cinema Rosa in Tokyo, as well as other theaters throughout Japan. While limited supplies last, advance tickets for the first film will go on sale on December 3 in a bundle with a Movi-Ticke Card, as well as a postcard set for the initial run.

The 13-episode Overlord television anime series premiered in Japan in July 2015. The story takes place in the year 2138 when virtual reality gaming is booming. Yggdrasil, a popular online game, is quietly shut down one day. However, the protagonist Momonga decides to not log out. Momonga is then transformed into the image of a skeleton as "the most powerful wizard." The world continues to change, with non-player characters (NPCs) beginning to feel emotion. Having no parents, friends, or place in society, this ordinary young man Momonga then strives to take over the new world the game has become.

Funimation streamed the anime series as it aired in Japan, and the company released the series with an English dub on Blu-ray Disc and DVD on November 8.

The 11th novel volume also bundled a Blu-ray Disc that contains 30 minutes of new footage of the Ple Ple Pleiades chibi anime short series, featuring the appearance of the Pleiades combat maids, as well as the rest of the Floor Guardians.

Kugane Maruyama began the original light novel series online in 2010, and Kadokawa's Enterbrain imprint then published it in print with illustrations by so-bin in 2012. The series has over 2.5 million copies in print in Japan. Yen Press licensed the novel series for North America, and will publish the third volume in January. Yen Press will also publish the third volume of Hugin Miyama and Satoshi Ōshio's manga adaptation in December.