I Am the King

Ju Ji-hoon

Grand Prince Choong-nyung / Deok-chil

Baek Yoon-sik

Hwang Hee

Byun Hee-bong

Shin Ik-yeok

Park Young-kyu

King Taejong

Im Won-hee

Hae-goo

Kim Soo-ro

Warrior Hwang-goo

Lee Hanee

Soo-yeon

Baek Do-bin

Prince Yangnyeong

Lee Mi-do

Crowned Princess

Kim So-hyun

Sol-bi

Im Hyung-jun

Jang Young-sil

Yoon Kyung-ho

Geun-bae

Park Kyung-man

Uigeumbu ascetic

Han Yeo-wool

Tribute young woman

Lee Dong-jin

Warehouse Servant

Woo Mi-hwa

Sol-bi's mother

Son Gwang-ik

Ornament Merchant

Ha Jung-hoon

Constable

Choi Gwang-deok

Uigeumbu Judge

Lee Kwang-se

Royal Physician