Yeo Jin-goo

as Goo Chan-sung

as Jang Young-sil (voice)

as Hwa-yi

as Lee Hwon (young)

as Self

as Han Joo-won

as Park Jong-chul

as Yong-dae

as Yi Myeon

as Young Hong-rim

as Eun Gye-hoon

as Ah-gwi's Follower

as Park Hee-chan

as Young Killa

as Young Kim Jin-hyuk

as Yong

as Sung Hae-Sung

as Clown Ha-seon / King Yi-heon

as Jung Jae-min

as Prince Gwanghae

as Kim Woo-Jin

as Lee Gyeom (young)

as Yeong-gwang

as Han Jung-woo (young)

as Soo-myung

as Ddol-bok (teen)

as King Yeongjo

as Self

as Baek Dong-soo (young)

as Young Goo

as Ho-dong (young)

as Young Tae

as Self - Planet Master

as Self

as Self

as Self / MC

as Self

as Self

as Lee Byung-joo

as Hong Hye-sung

as Self

as Self

as Da-sung

as Kim Goni (young)

as Self

as Self

as Narrator (voice)

as Self

as Boy