Jun Ji-hyun

Character: The Girl

Cha Tae-hyun

Character: Kyun-woo

Kim In-mun

Character: Kyun-woo's Father

Song Ok-suk

Character: Kyun-woo's Mother

Han Jin-hee

Character: The Girl's Father

Hyun Sook-hee

Character: The Girl's Mother

Kim Il-woo

Character: Quintuplets

Seo Dong-won

Character: Army Deserter

Yoo Soon-chul

Character: Old Man

Park Seon-a

Character: Policewoman

Im Ho

Character: Blind Date Man

Lee Mu-yeong

Character: (uncredited)

Kwak Jae-yong

Character: Covered Cart Bar Customer

Yang Geum-seok

Character: Kyun-woo's Aunt

Kim Min-jae

Character: Kyun-woo (young)

Kim Young-jun

Character: Pink

Lee Ji-hoon

Character: Night

Park Seung-bae

Character: Tango Man