Gianna Jun

The Girl

Cha Tae-hyun

Kyun-woo

Kim In-mun

Kyun-woo's Father

Song Ok-suk

Kyun-woo's Mother

Han Jin-hee

The Girl's Father

Hyun Sook-hee

The Girl's Mother

Kim Il-woo

Quintuplets

Seo Dong-won

Army Deserter

Yoo Soon-chul

Old Man

Park Seon-a

Policewoman

Lim Ho

Blind Date Man

Lee Mu-yeong

(uncredited)

Kwak Jae-yong

Covered Cart Bar Customer

Yang Geum-seok

Kyun-woo's Aunt

Kim Min-jae

Kyun-woo (young)