Son Ye-jin

as Ji-hye / Joo-hee

Cho Seung-woo

as Joon-ha

Zo In-sung

as Sang-min

Lee Ki-woo

as Tae-soo

Seo Young-hee

as Na-hee

Lee Joo-Eun

as Soo-kyeong

Kim Byeong-ok

as Homeroom Teacher

Lee Seung-cheol

as Tae-soo's Father

Hyun Sook-hee

as Tae-soo's Mother

Lee Mi-sook

as Joo-hee's Mother

Choi Dae-woong

as Elderly Man

Kim Jung-tae

as Friend at the Countryside

Lee Seo

as Grenade Thrower

Park So-eun

as Young Ji-hye

Geum Dong-hyeon

as Last Leaf Performer

Im Ye-jin

as Canteen Operator

Jeon Jeong-ro

as Friend at the Countryside

Han Geun-wook

as Joo-hee's Father

Park Do-yoo

as Seokwoo