Friend— Full Cast

Yu Oh-seong

as Joon-seok

Jang Dong-gun

as Dong-soo

Seo Tae-hwa

as Sang-taek

Jung Woon-taek

as Jeong-ho

Kim Bo-kyung

as Jin-sook

Ki Joo-bong

as Mustache

Joo Hyun

as Joon-seok's Father

Jeon Young-woon

as Dong-soo's Father

Lee Jae-yong

as Scar-Eye

Kim Hyun-ji

as Tall Woman

Yoo Seung-il

as Child Joon-seok

Jeong Hee-ryong

as Child Dong-soo

Kim Joon-beom

as Child Sang-taek

Kim Seong-bok

as Child Joong-ho

Kang Shin-il

as Sang-taek's Father