Gianna Jun as The Girl

Cha Tae-hyun as Kyun-woo

Kim In-mun as Kyun-woo's Father

Song Ok-suk as Kyun-woo's Mother

Han Jin-hee as The Girl's Father

Hyun Sook-hee as The Girl's Mother

Kim Il-woo as Quintuplets

Seo Dong-won as Army Deserter

Yoo Soon-chul as Old Man

Park Seon-a as Policewoman

Im Ho as Blind Date Man

Lee Mu-yeong as (uncredited)

Kwak Jae-yong as Covered Cart Bar Customer

Yang Geum-seok as Kyun-woo's Aunt

Kim Min-jae as Kyun-woo (young)

Kim Young-jun as Pink

Lee Ji-hoon as Night

Park Seung-bae as Tango Man