
Inspired by Mark Twain's "The Prince and the Pauper," this South Korean film explores a pivotal moment in Joseon Dynasty history. It portrays the three months leading up to Choong-nyung’s ascension to the throne, a period largely omitted from the official Annals of the Joseon Dynasty. Initially dismissed as a bookish recluse, Prince Choong-nyung is unexpectedly chosen as the heir after his older brothers fail to meet their father’s expectations. The film reveals the events and challenges faced during this crucial time, before he becomes the revered King Sejong, known for creating the Korean alphabet and advancing scientific and legal progress.
Does I Am The King have end credit scenes?
No!
I Am The King does not have end credit scenes. You can leave when the credits roll.
Explore the complete cast of I Am The King, including both lead and supporting actors. Learn who plays each character, discover their past roles and achievements, and find out what makes this ensemble cast stand out in the world of film and television.

Yoon Kyung-ho
Geun-bae

Lee Mi-do
Crowned Princess

Kim So-hyun
Sol-bi

Im Won-hee
Hae-goo

Lee Dong-jin
Warehouse Servant

Baek Yoon-sik
Hwang Hee

Kim Soo-ro
Warrior Hwang-goo

Ju Ji-hoon
Grand Prince Choong-nyung / Deok-chil

Park Young-kyu
King Taejong

Byun Hee-bong
Shin Ik-yeok

Lee Ha-nee
Soo-yeon

Baek Do-bin
Prince Yangnyeong

Lim Hyung-jun
Jang Young-sil

Han Yeo-wool
Tribute young woman

Park Kyung-man
Uigeumbu ascetic

Woo Mi-hwa
Sol-bi's mother
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Read the complete plot summary of I Am The King, including all major events, twists, and the full ending explained in detail. Explore key characters, themes, hidden meanings, and everything you need to understand the story from beginning to end.
In a Joseon-era kingdom, the aging King Taejong Park Young-kyu watches his two elder princes fail to win his favor. When they fall short, the king commands the younger heir, Choong-nyung Ju Ji-hoon to prepare for the throne, even as Choong-nyung secretly longs for a quiet, book-filled life far from royal duties.
After hours of contemplation, Choong-nyung escapes by climbing over the palace wall, seeking a breath of freedom away from coronation rituals. Out in the world beyond the gates, he meets a bad-tempered, drunken slave named Deok-chil, who is at the palace to rescue the love of his life, imprisoned for being the daughter of a suspected spy. Deok-chil’s rough edge and urgent mission collide with Choong-nyung’s desire to disappear from royal expectations.
Deok-chil and Choong-nyung cross paths in a moment of chance and recognition: the slave bears a striking resemblance to the prince, so Choong-nyung seizes the opportunity to disguise himself as a slave, and the two exchange clothes. The plan seems simple, but fate has its own reckoning. In a terrible twist, Choong-nyung is knocked unconscious, wakes to find himself mistaken for a slave, and Deok-chil is unexpectedly thrust onto the throne.
As Choong-nyung ventures beyond the palace walls, he begins to see the world through the eyes of ordinary people—their struggles, their hunger, and their daily battles. The escape pulls him away from the sweetness of scholarly life and into a broader reality where the lines between ruler and commoner blur. This sudden exposure to life outside the gilded gates slowly reshapes his understanding of duty, leadership, and what it means to lead a nation.
What unfolds is a story rooted in identity and power, where a prince’s reluctance to rule collides with the unexpected responsibilities of a throne he never truly claimed. The emotional pull comes from Choong-nyung’s internal conflict: clinging to his beloved books and a peaceful life, he also faces the possibility that true leadership may require stepping into a world he once avoided. The film uses a clever setup—a royal heir swapping roles with a loyal, fierce slave—to examine how society stamps individuals with labels and how one person’s choices can ripple through a kingdom.

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