Pemeran 20th Century Girl

Kim You Jung (김유정)

as Na Bo Ra

Pemeran Utama

Byeon Woo Seok (변우석)

as Poong Woon Ho

Pemeran Utama

Park Jung Woo

as Baek Hyun Jin

Pemeran Utama

Roh Yoon Seo

as Kim Yeon Du

Pemeran Utama

Kim Sung Kyung

as [Na Bo Ra's mother]

Pemeran Pembantu

Jung Suk Yong

as [Na Bo Ra's father]

Pemeran Pembantu

Lee Cheon Mu

as Na Ba Da [Bo Ra's brother]

Pemeran Pembantu

Yoon Yi Reh

as "Madam"

Pemeran Pembantu

Jeon Hye Won

as "Darn It"

Pemeran Pembantu

Jo Ji Hyun

as [Teacher]

Pemeran Pembantu

Kang Chae Young

as Bok Soon

Pemeran Pembantu

Kim Nu Rim

as Dong Wook

Pemeran Pembantu

Lee Woo Sung

as Min Hong Gi

Pemeran Pembantu

Choi Gyo Shik

as [Mailman]

Pemeran Pembantu

Jung Min Joon

as Joseph [Child]

Pemeran Pembantu

Han Hyo Joo

as Na Bo Ra [Adult]

Bintang Tamu

Ryu Seung Ryong (류승룡)

as [Woon Ho's father]

Bintang Tamu

Gong Myoung (공명)

as Jung Woon Ho [Blind Date]

Bintang Tamu

Ong Seong Wu (옹성우)

as Joseph [Un Ho’s brother]

Bintang Tamu

Lee Bum Soo (이범수)

as Hak Joo [Dean of students]

Bintang Tamu

Park Hae Joon (박해준)

as [School nurse]

Bintang Tamu

Shin Dong Ryuk

as [Mulberry extract vendor]

Bintang Tamu

Dalpalan

Composer

Yang Jin Mo

Editor

Bang Woo Ri

Screenwriter & Sutradara

Shin Bo Kyeong

as [Bo Ra's friend]

Bit part

Choi Hoon

as [Paradise spa employee #1]

Bit part

Jung Tae Ryung

as [Broadcasting class student 1]

Bit part

Kim Jeong Nam

as [Principal]

Bit part