Meet the Run On cast, featuring Im Si-wan, Shin Se-kyung, Choi Soo-young, and Kang Tae-oh in a heartwarming romance about finding love while chasing dreams in the fast-paced world of sports and translation.
Table of Contents
Introduction

Run On is a South Korean romantic drama that aired in 2020, captivating viewers with its unique blend of sports, love, and personal growth. The series follows the journey of a former track athlete and a subtitle translator as they navigate their vastly different worlds while slowly falling in love.
Run On Cast
Im Si-wan as Ki Seon-gyeom
Im Si-wan plays a former national sprinter who chooses integrity over fame, stepping away from the sport after a controversial incident. Known for his calm demeanor and deep empathy, his character transitions into a sports agent, reflecting his journey of personal growth. Si-wan delivers a nuanced performance, portraying Seon-gyeom’s quiet strength and moral compass.
Shin Se-kyung as Oh Mi-joo
Shin Se-kyung portrays a passionate subtitle translator who values independence and emotional honesty.Through her performance, Shin brings warmth and vitality to the drama, balancing sensitivity with assertiveness.
Kang Tae-oh as Lee Young-hwa
Kang Tae-oh plays Lee Young-hwa, a kind-hearted and artistic university student who becomes romantically involved with Dan-ah. His character is intuitive, expressive, and patient—offering a stark contrast to Dan-ah’s rigid, business-oriented life. Kang’s performance adds a gentle, humorous, and emotionally rich layer to the series.
Supporting Cast
Park Young-gyu as Ki Jung-do
His stern and controlling nature creates constant tension in Seon-gyeom’s life, serving as a representation of societal pressure and parental expectations.
Cha Hwa-yeon as Yook Ji-woo
Seon-gyeom’s mother, a renowned actress, who is elegant yet emotionally distant. Her strained relationship with her son adds complexity to Seon-gyeom’s character development.
Ryu Abel as Ki Eun-bi
Seon-gyeom’s older sister and a professional golfer. Unlike her brother, Eun-bi conforms to the demands of fame, but she shares his burden of growing up in a rigid, high-profile family. She adds a sibling dynamic that highlights different coping strategies under family pressure.
Lee Hwang-eui as Seo Myung-pil
Dan-ah’s loyal secretary and right-hand man. Quietly supportive and always present, his role brings light comedic relief and highlights Dan-ah’s softer side.
Conclusion
The cast of Run On delivers a heartfelt and memorable performance that elevates the drama beyond a typical romance. From the emotionally layered portrayals by Im Si-wan and Shin Se-kyung to the charismatic chemistry between Choi Soo-young and Kang Tae-oh, each actor brings depth and nuance to their role. Supported by a well-rounded secondary cast, the series explores themes of love, identity, and personal growth with sincerity and charm. Run On stands out not just for its storytelling, but for the strong performances that make each character feel real and relatable.
The Fabulous Cast & Their Role 2022 Romantic Kdrama
(FAQs)
Who plays the male lead in Run On?
Im Si-wan stars as Ki Seon-gyeom, a former track athlete who becomes a sports agent.
Who is the female lead in Run On?
Shin Se-kyung plays Oh Mi-joo, a confident and passionate subtitle translator.
Do the main actors have chemistry off-screen?
Yes, the cast shared great camaraderie behind the scenes, often praised for their natural interactions and comfort with each other during filming.
Has Im Si-wan acted in similar roles before?
While known for versatile roles, Run On is unique in portraying a gentler, emotionally reserved character compared to some of his previous intense performances.
Was Shin Se-kyung’s role well-received?
Yes, viewers appreciated her portrayal of Mi-joo’s strong, independent spirit and emotional vulnerability.
Is this one of Kang Tae-oh’s breakout roles?
Yes, his charming performance gained significant attention and contributed to his rising popularity.
What’s unique about Choi Soo-young’s character?
Her character challenges traditional gender roles in corporate Korea, making her a standout in the show for her assertiveness and emotional depth.
Did the supporting cast play a major role in the drama?
Absolutely. Characters like Eun-bi, Myung-pil, and Mae-yi added emotional texture and grounded the main storylines with realism and humor.