Heo Joon-ho (허준호) is a South Korean actor.  He was born on April 14, 1964. His father was actor Heo Jang-kang.

Heo Joon-ho plays as Choi Tae-guk in Kingdom.
Heo Joon-ho is the top #1 member of the cast and appears in 16 episodes.

Ju Ji-hoon is a South Korean actor. He began as a model but transitioned into acting with his breakout role as Crown Prince Lee Shin in 2006's Princess Hours. Ju Ji-hoon is perhaps most widely known for his role Haewonmak in the box office smash hit films Along with the Gods: The Two Worlds and Along with the Gods: The Last 49 days and his role of Prince Yi Chang in the Netflix Historical Zombie TV series Kingdom.

Ju Ji-hoon plays as Crown Prince Chang in Kingdom.
Ju Ji-hoon is the top #2 member of the cast and appears in 12 episodes.

Ryu Seung-ryong (류승룡) is a South Korean actor.

Ryu Seung-ryong plays as Cho Hak-Joo in Kingdom.
Ryu Seung-ryong is the top #3 member of the cast and appears in 12 episodes.

Bae Doo-na (born October 11, 1979) is a South Korean actress and photographer. She is best known outside Korea for her role as the protagonist's political activist girlfriend, Cha Yeong-mi, in Park Chan-wook's film Sympathy for Mr. Vengeance (2002) and as archer Park Nam-ju in The Host (2006). Description above from the Wikipedia article Bae Doo-na, licensed under CC-BY-SA, full list of contributors on Wikipedia.

Bae Doo-na plays as Seo-Bi in Kingdom.
Bae Doo-na is the top #4 member of the cast and appears in 12 episodes.

Jun Suk-ho plays as Cho Beom-Pal in Kingdom.
Jun Suk-ho is the top #5 member of the cast and appears in 12 episodes.

Kim Hye-jun plays as Queen Cho in Kingdom.
Kim Hye-jun is the top #6 member of the cast and appears in 12 episodes.

Kim Sang-ho plays as Han Doo-sik in Kingdom.
Kim Sang-ho is the top #7 member of the cast and appears in 10 episodes.

Korean actor best known for his role as "the Devil" in The Gangster, the Cop, the Devil (2019) and as a supporting villain in The Outlaws (2017).

Kim Sung-kyu plays as Do Ji-tae in Kingdom.
Kim Sung-kyu is the top #8 member of the cast and appears in 8 episodes.