- Cha Tae-hyun
- Kyun-woo
- Jun Ji-hyun
- The Girl
- In-mun Kim
- Kyun-woo's Father
- Song Wok-suk
- Kyun-woo's Mother
- Han Jin-hee
- The Girl's Father
- Sook-hee Hyun
- The Girl's Mother
- Il-woo Kim
- Quintuplets
- Yoo Soon-cheol
- Old Man
- Seo Dong-won
- Deserter
- Kim Min-jae
- Junior High School Kyun-woo
- Nam-hwi Heo
- Elementary School Kyun-woo
- Lee Jae-ho
- Neighborhood Friend 1
- Joon-yeong Park
- Neighborhood Friend 2
- Cheol-ho Hyeon
- Neighborhood Friend 3
- Jong-hun Hyeon
- School Friend 1
- Kyeong-hun Jo
- Gangster 1
- Son Kwang-eop
- Gangster 3
- Jae-ha Seo
- Police Officer
- Tae-yeong Kim
- Professor
- Yang Geum-seok
- Kyun-woo's Aunt
- Lim Ho
- The Girl's Blind Date
- Bae Jang-soo
- Original man 2
- Park Sun-a
- Female Police Officer
- Jin Tae-hyun
- Kendo Trainee
- Jae-young Kwak
- Covered Cart Bar Customer