The Host

Song Kang-ho

Park Gang-du

Byun Hee-bong

Park Hie-bong

Park Hae-il

Park Nam-il

Bae Doona

Park Nam-joo

Ko Asung

Park Hyun-seo

Oh Dal-su

The Monster (voice)

Lee Jae-eung

Se-jin

Lee Dong-ho

Se-joo

Yoon Je-moon

Homeless Man

Yim Pil-sung

Fat Guevara

Kim Roi-ha

Yellow Suit at Funeral

Koh Soo-hee

Hostage nurse

Kim Hak-sun

Civilian Military Kim

Scott Wilson

Douglas

Brian Rhee

Young Korean Doctor

Paul Lazar

American Doctor

David Anselmo

Donald

Baek Do-bin

Fumigation Truck Skinny Man

Martin Lord Cayce

U.S. Senator (uncredited)

Choi Dae-sung

Man from Duck Boat (uncredited)

Choi Doo-yeong

Man on Blind Date (uncredited)

Choi Jae-sup

Detective Agency Subordinate 1 (uncredited)

Jung Seo-yoon

Woman with Long Hair (uncredited)

Philip Hersh

Additional Voices (voice) (uncredited)