Weak Hero Class 1 Cast & Character Guide

Netflix recently added the popular K-drama, Weak Hero Class 1, to its catalog, and the following are the South Korean stars who make up this action-packed K-drama. First released in 2022, Weak Hero Class 1 centers on a young man named Yeon Si-eun, who is dedicated to studying hard and maintaining his spot in the 1% of his class. However, Si-eun runs into trouble when bullies begin targeting him. Using his knowledge of physics and quick thinking, Si-eun fights back against his attackers, and gets help from two other classmates.

Over the course of two seasons, Weak Hero Class 1 has built up a notable cast of stars. Alongside the three main characters, the K-drama boasts various supporting actors and guest appearances. Weak Hero Class 1 is certainly compelling because of its unique premise and coming-of-age K-drama themes, but it also stands out because of its performances. Those who decide to pick up this K-drama may find themselves falling in love with these South Korean stars.

Park Ji-hoon As Yeon Si-eun

Date of Birth: May 29, 1999

Active Since 2006

Park Ji-hoon was born in Masan, South Korea. His acting career began at a very young age with minor roles in television series like Jumong and The King and I. Throughout his teen years, Ji-hoon pivoted to K-pop, training to become an idol singer. He joined the group Wanna One. After their disbandment, he pursued a solo music career. In 2019, he returned to acting, appearing in dramas such as Flower Crew: Joseon Marriage Agency and Love Revolution. In Weak Hero Class 1, Ji-hoon plays the bright and determined lead character, Yeon Si-eun.

Park Ji-hoon's Most Notable Projects	Who He Played
Produce 101	Contestant
Flower Crew: Joseon Marriage Agency	Go Young-soo
Love Revolution	Gong Joo-young
At A Distance, Spring Is Green	Yeo Jun
Love Song for Illusion	Sajo Hyun / Ak-hee

Choi Hyun-wook As Ahn Su-ho

Date of Birth: January 30, 2002

Active Since 2019

Choi Hyun-wook was born in South Korea. One of his earliest roles came in 2020 when he appeared in the web drama, Pop Out Boy! Afterward, he took on several more small roles until his breakout in 2022 when he starred in the coming-of-age drama, Twenty-Five Twenty-One.Soon after, he took on the part of Ahn Su-ho in Weak Hero Class 1. Su-ho is the strongest fighter in his class who cares little about school, but steps up to help Si-eun.

Choi Hyun-wook Most Notable Projects	Who He Played
Pop Out Boy!	Contestant
Racket Boys	Na Woo-chan
Twenty-Five Twenty-One	Moon Ji-wong
Twinkling Watermelon	Ha Yi-chan
My Dearest Nemesis	Ban Joo-yeon

Hong Kyung As Oh Beom-seok

Date of Birth: February 14, 1996

Active Since 2017

Hong Kyung was born in South Korea. He earned his first role in 2017 in the TV series, Queen of Mystery. For the next few years, he picked up minor parts in K-dramas. His big break eventually came in 2020 when he made his feature film debut in the movie Innocence, which won him a Baeksang Arts Award for Best New Actor. In 2022, he starred in Weak Hero Class 1, which also gave him worldwide attention. Kyung plays Oh Beom-seok, a shy boy who decides to help out Si-eun due to his own past as a victim of bullying.

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Hong Kyung's Most Notable Projects	Who He Played
Queen of Mystery	Bully
Innocence	Ahn Jung-soo
Lovers of the Red Sky	Choi Jung
Weak Hero Class 1	Oh Beom-seok
Revenant	Lee Hong-sae

Weak Hero Class 1 Supporting Cast & Characters

Lee Yeon as Yeong-i: Lee Yeon is a South Korean actress best-known for playing a 13-year-old boy accused of murder in the 2022 Netflix drama, Juvenile Justice. In Weak Hero Class 1, she plays Yeong-i, a courageous and beautiful runaway who is the object of the boys' affections.

Shin Seung-ho as Jeon Seok-dae: Shin Seung-ho is an established actor who gained attention for series such as A-Teen, Love Alarm, D.P., and Alchemy of Souls. He plays Jeon Seok-dae in Weak Class Hero 1, the leader of a group of delinquents who becomes involved with Si-eun and his friends.

Kim Su-gyeom as Jeon Yeong-bin: Although Kim Su-gyeom began acting in 2021, Weak Hero Class 1 is the role that allowed him to breakout in the industry. In the role of Jeon Yeong-bin, Su-gyeom plays a school bully who targets Si-eun, and eventually escalates his violence to concerning proportions.

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Cha Woo-min as Kang Woo-young: Cha Woo-min is a relatively new actor who is known for appearing in Night Has Come and Study Group. In Weak Hero Class 1, he plays an MMA fighter who holds a grudge against Su-ho.

Na Chul as Kim Gil-soo: Na Chul was a South Korean actor who took on roles in Vincenzo, Happiness, and Little Women. He portrayed Kim Gil-soo in Weak Hero Class 1, a villain who runs a gang and scams teenagers out of money through a gambling app.

Gong Hyun-joo as Si-eun's mother: Known for You Are My Destiny and Hotel King, Gong Hyun-joo plays Si-eun's mother, a math teacher who is constantly busy.

Kim Sung-kyun as Gyu-jin: Kim Sung-kyun is a long-time actor best known for series such as Nameless Gangster: Rules of the Time, the Reply series, D.P., and Divorce Attorney Shin. He plays Gyu-jin, Si-eun's father and judo coach.

Jo Han-chul as Oh Jin-won: Jo Han-chul has appeared in Vincenzo, Hometown Cha-Cha-Cha, and Gyeongsong Creature. In Weak Hero Class 1, he plays Beom-seok's cruel assemblyman father.