Pada 12 April 2020, [[Netflix]] mengumumkan melalui siaran pers bahwa [[JTBC]] Studios dan Film Monster bersama Kim Jong-hak Production akan memproduksi seriserial berjudul ''All of Us Are Dead'' berdasarkan webtoonwebtun populer ''Now at Our School''.<ref>{{cite web|first=Minji|last=Kang|url=https://media.netflix.com/en/press-releases/netflix-introduces-new-original-series-all-of-us-are-dead-based-on-popular-korean-webtoon|title=Netflix Introduces New Original Series ''All of Us Are Dead'' Based on Popular Korean Webtoon|date=April 12, April 2020|accessdate=June 18, Juni 2020|website=Netflix Media}}</ref><ref>{{cite web|first=Nancy|last=Tartaglione|url=https://deadline.com/2020/04/netflix-all-of-us-are-dead-korea-series-zombie-1202906726/|title=Netflix Orders Korean Zombie Series ‘All Of Us Are Dead’|date=April 13, April 2020|accessdate=June 18, Juni 2020|website=[[Deadline Hollywood|Deadline]]}}</ref>
=== Pemilihan pemeran ===
Pada tanggal 19 April 2020, [[Yoon Chan-young]] dikonfirmasi untuk membintangi seriserial tersebut sebagai salah satu siswa.<ref>{{cite web|first=Ji-hye|last=Yoo|url=https://www.hancinema.net/yoon-chan-young-reportedly-starring-in-the-netflix-drama-all-of-us-are-dead-140655.html|title=Yoon Chan-young Reportedly Starring in the Netflix Drama "All of Us Are Dead"|date=19 April 19, 2020|accessdate=June18 18,Juni 2020|website=[[HanCinema]]}}</ref> [[Park Ji-hoo]] bergabung dengan pemeran utama pada tanggal 22 April.<ref>{{Cite web|first=Gyu-min|last=Noh|url=https://www.hankyung.com/entertainment/article/2020042285834|title='벌새' 박지후, 넷플릭스 '지금 우리 학교는' 주연 물망…"확인중" [공식]|date=22 April 22, 2020|website=Hankyung|language=ko|accessdate=June 18, Juni 2020}}</ref> Pada tanggal 1 Juli, Jo[[Cho Yi-hyun]], [[Park Solomon]], dan [[Yoo In-soo]] bergabung dengan mereka dalam seriserial ini.<ref>{{Cite web|first=Ha-eun|last=Jung|url=https://n.news.naver.com/entertain/article/468/0000674611|title='지금 우리 학교는' 윤찬영X박지후X조이현X로몬X유인수 캐스팅 확정[공식]|date=July 1, Juli 2020|website=Sports Chosun|language=ko|accessdate=July 1, Juli 2020}}</ref>
=== Pengambilan gambar ===
Produksi dihentikan sementara pada Agustus 2020 karena kembali naiknya angka penularan [[Pandemi COVID-19 di Korea Selatan|COVID-19 di Korea Selatan]].<ref>{{cite web|first=Geum-joo|last=Cheon|url=https://www.hancinema.net/netflix-korean-contents-to-cease-production-due-to-covid-19-144568.html|title=Netflix Korean Contents to Cease Production Due to COVID-19|date=August 27, Agustus 2020|accessdate=October 20, Oktober 2020|website=[[HanCinema]]}}</ref>
