Gong Yoo
Seok-woo

Kim Su-an
Soo-ahn

Jung Yu-mi
Sung-gyeong

Don Lee
Sang-hwa

Choi Woo-shik
Yeong-gook

An So-hee
Jin-hee

Kim Eui-sung
Yong-suk

Ye Su-jeong
In-gil

Park Myung-shin
Jong-gil

Choi Gwi-hwa
Homeless Man

Jeong Seok-yong
Captain of KTX

Kim Chang-hwan
Kim Jin-mo

Jang Hyuk-jin
Ki-chul

Shim Eun-kyung
Stowaway

Lee Joo-sil
Seok-woo's Mother

Kim Jae-rok
Mr. Kim

Cha Chung-hwa
Mountaineering Woman

Han Ji-eun
Earphones Girl

Lee Jung-ok
Suit

Kim Ju-hun
Baseball Team Manager

Kim Keum-soon
Survivor

Jung Young-ki
Captain Min (voice)

Ok Joo-ri
Survivor

Woo Do-im
Cabin Attendant Min-ji

Song Ji-hyuk
Baseball Team

Kim Woon
Infected (uncredited)

Jeon Ye-eun
Infected (uncredited)

Baek Seung-hwan
Survivor (uncredited)

Yeon Sang-ho
Control Room (uncredited)

Choi Woo-sung
Infected (uncredited)

Lee Tae-yoon
Survivor (as Tae-Yoon Lee)