- Yoo Ah-in
- Oh Joon-woo
- Park Shin-hye
- Kim Yoo-bin
- Jeon Bae-soo
- Mask man
- Lee Hyun-wook
- Lee Sang-cheol
- Oh Hye-won
- Police officer
- Jeon Woon-jong
- Infected fireman
- Kyu-Ho Lee
- Infected burly person
- Lee Chae-kyung
- Mask man's wife
- Kyeong-won Son
- Infected security guard
- Yun-ho Park
- Infected person #1
- Na-Young Ko
- Infected person #2
- Seong-soo Han
- Infected person #3
- Park Soo-Chan
- Infected person #4
- Kim Yun-do
- Infected person #5
- Danbi Kim
- Infected person #6
- Shin Yeon-woo
- Infected person #7
- Kim Mi-rae
- Infected person #8
- Han-Joon Cho
- Infected person #9
- Ra-Hee Kim
- Infected person #10
- Hang Yun-ho
- Booby Trap Infected
- Jaeyoung Lee
- Infected Silhouette #1
- Yeo Hyo-Seung
- Infected Silhouette #2
- Kim Hak-sun
- Joon-woo's father
- So Hee-jung
- Joon-woo's mother
- Joo Bo-bi
- Joon-woo's sister
- Yang Mal-bok
- Mom with a knife
- Choi Da-in
- Middle school girl
- Yoo Yeon
- Middle-aged woman in sweater
- Lee Seung Chang
- Infected Police Officer #3
- Na Kyung Chul
- Rooftop News Reporter
- Thomas Cocquerel
- Male Patient
- Kim Da Young
- Infected Police Officer #4
- Jang Eui Don
- Man @ Veranda Glass Door
- Lee Dong-kyu
- Newscaster / Discussion Moderator
- Im Eun-ji
- Loan Company Commercial Model #2
- Han Sang Gyun
- Cho Sang Ho Professor At The National Defense University
- Yeon Jae Heum
- Family Photograph
- Hwang Yoon Ho
- Infected Booby Trap Guy
- Lee Gyu Ho
- Big Infected Person
- Park Jae Hyun
- Door Gunner
- Kang Hyun-goo
- Infected Police Officer #2
- Choi Gye Hyung
- Sart #2
- Jang Ji-geon
- Ramen commercial model
- Lee Seung Jin
- Sns Man
- Lee Yoo Jin
- Infected Police Officer #1
- Yang Soo Jin
- (voice)
- Eva Johansson
- Viktoria
- Go Hyun Jung
- Woman Being Bitten
- Angus Macfadyen
- The Man
- Kim Hoon Man
- Sang Chul's Brother
- Michelle Mao
- (voice) (as Michelle Fang)
- Zoe Marlett
- Daughter
- Madeleine Martin
- Ida
- Jeong Se Mi
- Weather Reporter
- No Jung Mi
- (voice)
- Park Chul Min
- Newscaster
- Lisa Moreau
- Hiker
- Yoon Ye Na
- Loan Company Commercial Model #3
- Jimmy Olsson
- HÃ¥kan
- Philip Oros
- Anton
- Chantal Perron
- Detective
- Kim Hak Seon
- Oh Jun Hui Joon Woo's Father
- Ye Hyo Seung
- Silhouette Of An Infected Person #2
- Jin So-Yeon
- Elena Kim
- Camille Stopps
- Female Patient
- Gerrick Winston
- Doctor
- Lee Hee Won
- Family Photograph
- Son Kyung Won
- Infected Security Guard
- Kim Hyun Woo
- Sart #1
- Shim So Yeon
- Discussion Panel Member
- Yeom Jeong Yeon
- Sang Chul's Girlfriend
- Jung Yeong-Do
- Loan Company Commercial Model #1
- Yeon Je Yi
- Family Photograph
