Yang Se-jong Filmography
| 2025 | |
| 2025 | Low Life (2025) (TV Series) · as Oh Hee-Dong |
| 2023 | Doona! (TV Series) · as Lee Won-Jun |
| 2019 | My Country: The New Age (TV Series) · as Seo Hwi |
| 2018 | Thirty, but Seventeen (TV Series) · as Gong Woo-Jin |
| 2017 | Temperature of Love (TV Series) · as On Jung-Sun |
| 2017 | Duel (TV Series) · as Lee Sung-Joon / Lee Sung-Hoon |
| 2017 | Saimdang, Light's Diary (TV Series) · as Lee Gyeom (young) |
| 2016 | Dr. Romantic (TV Series) · as Do In-Beom |
| 2019 | Coffee Friends (TV Series) · as Himself |
| 2010 | Running Man (TV Series) · as Self |
| 1999 | MAMA Awards (TV Series) · as Self - Presenter |
| 1986 | Golden Disc Awards (TV Series) · as Self - Presenter |