Pemeran The World of My 17

A Rin

as Oh Na Ri

Pemeran Utama

Hwang Bo Reum Byeol

as Lim Yu Na

Pemeran Utama

Kim Do Ah

as Lim Seon Ji

Pemeran Utama

Han Chae Kyung

as Seo Mi Rae

Pemeran Utama

Ryeo Un (려운)

as Yoo Jin Hyuk [Na Ri's classmate]

Pemeran Pembantu

Kwon Hyun Bin

as Jung Woo Kyung [Na Ri's one-pick / Mi Rae's best friend]

Pemeran Pembantu

Kim Seo An

as Kim Soo Bin [Na Ri's classmate]

Pemeran Pembantu

Kim Sul Hwa

as Choi Young Eun [Na Ri's classmate]

Pemeran Pembantu

Jo Ah Young

as Yang Mi Jeong [Na Ri's middle school friend]

Pemeran Pembantu

Kim Da Som

as Jin Ye Seul [Seon Ji's middle school classmate]

Pemeran Pembantu

Park Hyuk

Pemeran Pembantu

Lee In Young

Pemeran Pembantu

Nam Dae Jung

as Lee Seung Joon

Pemeran Pembantu

Ma Hyun Ji

as [Soo Bin's friend]

Bintang Tamu

Choi Hyun Jin

as Student

Bintang Tamu

Yoon Shi So

Screenwriter

Choi Sun Mi

Screenwriter & Sutradara