Pemeran Spring of Youth

Ha Yu Jun

as Sa Gye

Pemeran Utama

Park Ji Hu

as Kim Bom

Pemeran Utama

Lee Seung Hyub

as Seo Tae Yang

Pemeran Utama

Jo Han Chul

as Cho Sang Hun

Pemeran Pembantu

Kim Jong Tae

as Seo Min Cheol [Tae Yang's father]

Pemeran Pembantu

Cha Chung Hwa

as Kim Ja Yeong [Gyu Ri's mother]

Pemeran Pembantu

Seo Hye Won

as Bae Gyu Ri [Kim Bom's cousin]

Pemeran Pembantu

Han Yu Eun

as Cho Ji Na [Chief producer at JO.Ent]

Pemeran Pembantu

Kim Sun Min

as Kong Jin Gu [Tosa Gye drummer]

Pemeran Pembantu

Seo Dong Sung

as Lee No [The Crown band member]

Pemeran Pembantu

Kim Byung Gi

as [President of Hanju University]

Pemeran Pembantu

Han Jae Ha

as Yun Seung Su [General manager at JO.Ent]

Pemeran Pembantu

Kim Seo Ha

as Kang Seok Hui [Sang Hun's secretary]

Pemeran Pembantu

Kim Ji Young

as Mok Yeo Jin

Pemeran Pembantu

Kim Shin

as Thunder [The Crown Band member]

Pemeran Pembantu

Cru

as Cardi [The Crown member]

Pemeran Pembantu

Cha Yu Jin

as [Bom’s mother]

Pemeran Pembantu

Lee Joon Hee

as [Doctor] (Ep. 1)

Bintang Tamu

Kim Yong Myung

as [Student] (Ep. 1)

Bintang Tamu

Seo Jin Won

as [Staff] (Ep. 2)

Bintang Tamu

Im Seung Dae

as [Staff] (Ep. 2)

Bintang Tamu

Yoo Jae Pil

as [Band applicant] (Ep. 2)

Bintang Tamu

Patricia

as [Band applicant] (Ep. 2)

Bintang Tamu

Jonathan

as [Band applicant] (Ep. 2)

Bintang Tamu

Moon Se Yoon

as [Convenience store manager] (Ep. 2)

Bintang Tamu

Joo Yoon Chan

as Jae Jun

Bintang Tamu

Moon Woo Jin

as Sa Gye [Young]

Bintang Tamu

Park So Yi

as Kim Bom [Young]

Bintang Tamu

Seo Ye Bin

as [Fan]

Bintang Tamu

Kim Eun Soo

as [Student]

Bintang Tamu

Bae Jae Seong

as [Student]

Bintang Tamu

Oh Man Seok

as [Professor]

Bintang Tamu

Park Jin U

as [Restaurant owner]

Bintang Tamu

Bang Joo Hwan

as [Hanju University Hospital doctor]

Bintang Tamu

Hyeon Seo Ri

as [Christmas couple]

Bintang Tamu

Park Jun Seo

as [Ophthalmologist]

Bintang Tamu

Lee Myung Hee

as [Guardian]

Bintang Tamu

Han Soo Ho

as Se Gyu [Student]

Bintang Tamu

Kim Sung Yong

Sutradara

Kim Soon Ok

Screenwriter

Lee Hong Gi (이홍기)

as Lee Hong Gi [Lawyer] (Ep. 6)

Cameo

Ro Woon (로운)

as Ro Un [TV host] (Ep. 9)

Cameo

Jung Hae In (정해인)

as An Se Hun [Former Hanju University Hospital doctor] (Ep. 10)

Cameo

Lee Won Hee

Cameo

Seo Kang Jun (서강준)

as (Ep. 9)

Voice Actor