as young Suk-gyu
as Dong-yoon
as Kim Tae-hoon
as ID Pork
as Park Hyeon-soo
as Ah-jin
as Chu-won
as Yoon Soo
as Go Jeong-hyeok
as Nabi
as Session musician
as Kang Chan-sung
as Kang Tae-Joon
as Yun-Su
as Geum Gang-san
as Grand Prince Gwangpyeong
as Shin Heung-bok
as Kang Oh-soo (young)
as Jung Dong Min
as Shin Woo-hyuk
as Ha Seung-ri
as young Shin Ryu
as Tae-yeol
as Lee Ki-hyun
as Park Jae-in
as Chun-Woo
as Do Eun Chang / Do Shin Woo
as Yeo Ui-ju
as Grand Prince Suyang
as Man #5 best friend
as Sang Min
as Song Wan Ha
as Song Ji-min
as Kim Do-yoon
as Gwang Bak's school friend
