Lee Kyu-sung Filmography
| 2025 | Walking on Thin Ice (TV Series) · as Hwang Dong-Hyeon |
| 2025 | Dear Hongrang (TV Series) · as Hong Sik |
| 2025 | The Art of Negotiation (TV Series) |
| 2024 | Cinderella at 2 AM (TV Series) · as Bang Jang-Hee |
| 2024 | The Midnight Romance in Hagwon (TV Series) · as Park Gi-Seong |
| 2023 | Gyeongseong Creature (TV Series) · as Mori |
| 2023 | The Deal (TV Series) · as Im Tae-Young |
| 2023 | Joseon Attorney: A Morality (TV Series) · as Dong Chi |
| 2022 | Why Her? (TV Series) · as So Hyung-Chil |
| 2022 | Hope or Dope (TV Series) · as Heo Jeong-Tae |
| 2021 | On the Line · as The Youngest |
| 2021 | Not Out · as Min-Cheol |
| 2021 | My Roommate is a Gumiho (TV Series) · as Mountain Spirit |
| 2021 | Youth of May (TV Series) · as Jung Hye-Geon |
| 2021 | Nobleman Ryu's Wedding (TV Series) · as Moderator |
| 2020 | 8 Years · as Ki Cheol Min |
| 2020 | Oh! My Gran · as Assistant Manager Lee |
| 2020 | School Strange Stories (TV Series) · as Gi Chul-Min |
| 2020 | It's Okay to Not Be Okay (TV Series) · as Young Moon Sang-Tae |
| 2019 | When the Camellia Blooms (TV Series) · as Park Heung-Sik |
| 2019 | Touch Your Heart (TV Series) · as Kim Pil-Gi |
| 2018 | Swing Kids · as Man-Chul |
| 2018 | The Wrath · as Buddhist Monk |
| 2018 | Sketch (TV Series) · as Ahn Kyung-Tae |
| 2018 | Something in the Rain (TV Series) · as Jun-Hui's Friend |
| 2017 | Prison Playbook (TV Series) · as Jeong-Soo |