He is most active in theatre and playing supporting roles onscreen, but he has not gained much recognition. During his high school days, he said that he did not have any special interest in acting except for the fact that he had seen three dramas. He followed his friend for entering the entrance exam for Seoul Institute of the Arts, but his friend dropped out and he was elected. “Surprisingly, I enjoyed my college life so much, and after graduation I played roles naturally,” he said. Lee Seung-joon said, “Actually, I was acting in the theatre for the first time in my college days, I was really nervous when I waited before, but the feeling was good.” Lee Seung-joon has the ability to interpret various characters such as Wan Han, a funny general surgeon Song Sang Hyun, and Shin Woo Hyun from Sam Jung company. Lee Seung-joon and comedian Yoo Jae Suk were close friends. Both of them are alumni from same high school. They used to be best friends in high school. They ended up applying to the same college as well. The two reunited after 26 years through the April 24, 2016 episode of SBS’s Running Man broadcasting.
