The actor made his debut in 2015 through drama 'Awl', but leading up to his debut, he's built up his experience through minor roles, staff roles on filming sets, and more. He also said that 3 years ago, while crossing a crosswalk, he got in a car accident due to a car that ran a red light, and suffered from severe injuries. He reminisced about the time, saying, "I had prepared contemporary dance as my talent for an audition, but because my body was broken, I wasn't able to do anything. I had an opportunity to appear in a movie at the time, but it fell through, and all of the auditions during that time fell through. I thought about a lot of things at the time. I thought to myself, that one could become so useless so suddenly. I was able to learn a valuable lesson about life." 

After 'The Liar and His Lover', Lee Seo Won will be appearing in a web drama titled 'Last Minute Romance' with Seungyeon.