Don Lee
Ba-woo
Seohyun
Sharon
David Lee
Kim Gun
Kyung Soo-jin
Jung-won
Jung Zi-so
Eun-seo
Choi Gwang-il
Father Marco
Song Yo-sep
Middle-Aged Man
Park Ock-chool
Auntie
Han Gi-joong
Chief of Police
Lee Da-il
Mysterious Man
Jo Hye-yeon
Female Guest
Yoon Ji-won
Su-jin
Jeon Se-won
Female Patient
Nam Mi-jung
Landlady
Park Ki-seon
Landlord
Cha Woo-jin
CCTV Security Guy
Kim So-yang
CCTV Security Girl
Kim Do-gun
Delivery Driver
Seo Mun-ho
Male Nurse 1
Lee Seon-ho
Male Nurse 2
Lee Sung-woo
Basement Demon 1
Lee Jae-suk
Basement Demon 2
Carla Fernanda Avila Escobedo
Hideout Informant
Lee Tae-young
Thumbs-Up Guy
Lee So-yoon
Orphanage Child 1
Kim Si-woo
Orphanage Child 2
Kim Woo-bin
Orphanage Child 3
Jeong Ha-bin
Orphanage Child 4 / Additional Children Voices 4 (voice)
Jang Woo-joon
Orphanage Child 5
Lim Yong-soon
Pastor
Na Gyeong-cheol
Male Announcer (voice)
Lee Seung-min
Female Announcer 1 (voice)
Kim Seon-yeong
Female Announcer 2 (voice)
Lee Si-hyeong
Hospital Security Guard
Lee Won-haeng
Hospital Patient 1 / Hallway Worshipper 1
Jeong Yoon-seong
Hospital Patient 2
Ryu Seong-cheol
Hospital Patient 3
Noh Jae-hoon
Hospital Patient 4
Kim Ji-yeong
Hospital Patient 5
Kim San-seong
Hospital Patient 6
Choi Hong-rak
Hospital Patient 7
Jeong Kyeong-sook
Sister Angela
Lee Jae-yi
Young Ba-woo
Kim Ye-gyeom
Young Joseph
Lee Seol-i
Young Sister Catalina
Kim Seong-dong
Young Father Marco
Mitch Craig
Junkie 1
Lee Young-jun
Junkie 2
Ahn Hyo-hoon
Junkie 3
Hong Ji-woo
Junkie 4
Ri E
Junkie 5
Kim Gi-soo
Junkie 6
Seon Woo
Junkie 7
Im Seo-ah
Junkie 8
Lee Seo-kyeong
Junkie 9
Ha Yoo-ri
Junkie 10
Kim Jeong-gil
Junkie 11
Seon Seung-min
Junkie 12
Do Yoo-ri
Junkie 13
Lee Jeong-woo
Junkie 14
Kim Ji-seon
Junkie 15
Lee Ji-yeong
Junkie 16
Lee Dong-gyoo
Junkie 17
Yook Ye-joo
Junkie 18
Jo Jeong-bin
Junkie 19
Jo Yoo-jin
Junkie 20
Song Hee-joo
Junkie 21
Choi I-jae
Junkie 22
Lee Da-ryeong
Junkie 23
Lee Hyeon-jin
Junkie 24
Kwon Hye-won
Junkie 25
Song Ji-hoon
Junkie 26
Seo Woo-hee
Junkie 27
Park Eun-cheol
Junkie 28
Hwang Tae-hee
Junkie 29
Sin Ji-in
Mentally Ill Person / Possessed Person
Kim Soo-woo
Paramedic
Lee Geon-goo
Hideout Demon 1
Maeng Seung-yeong
Hideout Demon 2
Kwon Ji-hoon
Hideout Worshipper 1
Kim Seok-jin
Hideout Worshipper 2
Park Geon-hee
Hideout Worshipper 3
Jo Seung-yeon
Hideout Worshipper 4
Hwang Yeong-yoon
Hideout Worshipper 5
Yoon Gi-hyeon
Hideout Worshipper 6
Jeong Sin-yeong
Hideout Worshipper 7
Park Joo-won
Pathologist's Assistant / Basement Worshipper 4
Moon Kyeong-rin
Pathologist / Hallway Worshipper 3
Kim Jin-woo
Hallway Worshipper 2
Park Seung-jin
Hallway Worshipper 4
Kim Ye-seong
Hallway Worshipper 5 / Basement Worshipper 2
Min Seon-gi
Spying Worshipper
Ji Ryoon
Basement Worshipper 1
Kim Tae-yoon
Basement Worshipper 5
Kim Woo-ram
Basement Worshipper 6
Yoon Jin-yul
Chapel Worshipper 1
Hyeon Seung-hwan
Chapel Worshipper 2
Nandin-Erdene Boldbaatar
Chapel Worshipper 3 / Basement Worshipper 3
Park Hyeon-joon
Chapel Worshipper 4
Kim Do-hoon
Chapel Worshipper 5
Jeong Ah-joon
Chapel Worshipper 6
Yoo Seong-gon
Chapel Worshipper 7
Jo Chang-geun
Chapel Worshipper 8
Yang Nam-wook
Chapel Worshipper 9
Park Jong-min
Chapel Worshipper 10
Hwang Dae-hyeon
Joseph
Jo Hyeon-gyeom
Monstrous Entity (voice)
Kang Seong-wook
Eun-seo's Demon Form (voice)
Choi Jin-ho
Moloch (voice)
Kim Nam-hyeon
Additional Male Voices 1 (voice)
Hwang Sang-jo
Additional Male Voices 2 (voice)
Wang Hee-jeong
Additional Male Voices 3 (voice)
Yeom Seung-cheol
Additional Male Voices 4 (voice)
Ahn Jeong-ho
Additional Male Voices 5 (voice)
Moon Eun-ji
Additional Female Voices 1 (voice)
Park So-hyeon
Additional Female Voices 2 (voice)
Choi Jae-eun
Additional Female Voices 3 (voice)
Lee Jae-bin
Additional Children Voices 1 (voice)
Lee Joo-won
Additional Children Voices 2 (voice)
Song Jae-yoon
Additional Children Voices 3 (voice)
Ryu Seung-su
Detective Choi
Jeon Ik-ryoung
Sister Catalina