Ko Asung Park Hyun-seo
Bong Joon Ho Director, Screenplay
Bae Doona Park Nam-joo
Song Kang-ho Park Gang-du
Oh Dal-su The Monster (voice)
Yoo Seung-mok Taxi Driver
Scott Wilson Douglas
Yoon Je-moon Homeless Man
Park Jin-woo Isolation Ward Constable (uncredited)
Park Hae-il Park Nam-il
Kwak Tae-yong Special Effects Makeup Artist
Min Kyung-jin Altar Security (uncredited)
Kim Roi-ha Yellow Suit at Funeral
Jung Seo-yoon Woman with Long Hair (uncredited)
Miky Lee Executive Producer
Lee Dong-yong 4th Mat 2 (uncredited)
Byun Hee-bong Park Hie-bong
Kim Hak-sun Civilian Military Kim
Ra Mi-ran Woman Stomping Her Feet (uncredited)
Lee Jae-eung Se-jin
Kim Sun-min Editor
Yang Gil-yeong Fight Choreographer
Son Young-soon Grandmother from Bus (uncredited)
Ryu Seong-hie Production Design
Kim Jin-seon Woman from Couple (uncredited)
Kim Woo-taek Executive Producer
Shin Hyeon-jong Mr. Yoon's Friend (uncredited)
Kwon Byung-gil Doctor from Isolation Ward 1 (uncredited)
Paul Lazar American Doctor
Jeong In-gi Isolation Ward Doctor (uncredited)
Seo Myeong-seok Stunts
Cho Sang-kyung Costume Design
Park No-shik Inquiry Officer
Park Jae-wook VFX Artist
Park Jeong-gi Fumigation Truck Dyed-hir Man (uncredited)
Coll Anderson Sound Designer
Kim Won-jung Stunts
Rob Nokes Sound Effects
Ko Chang-seok Nurse
Choi Tae-young Sound
Choi Jae-sup Detective Agency Subordinate 1 (uncredited)
Lee Seung-chul Production Sound Mixer
Hwang Hyo-kyun Special Effects Makeup Artist
Kim Byung-seo Camera Operator
Jung Sung-jin Visual Effects Director
Sean Garnhart Sound Designer
Kim Nan-hee Woman from Duck Boat (uncredited)
Lee Hee-eun Special Effects Makeup Artist
Kwon Tae-ho Stunts
David Anselmo Donald
Richard Mueck Painter, Sculptor
Kim Hyung-koo Director of Photography
Kim Hyun-woo Co-Executive Producer
Kevin Rafferty VFX Supervisor
Kwon Hyeok-pung Fisherman 1 (uncredited)
Lee Tae-yeong Stunts
Song Jong-hee Makeup & Hair
Jeong Tae-sung Executive Producer
Kwak Jung-ae Costume Design
Yang Hae-gil Stunts
Park Yong-ki Sound Re-Recording Mixer
Kim Byeong-gi Special Effects Supervisor
Lee Yong-ki Colorist
Kim Won-jung Stunts
Lee Byung-woo Original Music Composer
Toby Barron Painter, Sculptor
Yang Hong-sam Set Decoration
Philip Hersh Additional Voices (voice) (uncredited)
Kang Jong-ik VFX Supervisor
Jang Hee-chul Creature Design
Lewis Taewan Kim Co-Producer
Seo Ji-oh Stunts