Known For
Lee Si-eon Filmography
| 2025 | Nice to Not Meet You (TV Series) · as Blind Date |
| 2024 | Pilot · as Classmate |
| 2022 | Bad Prosecutor (TV Series) · as Go Joong-Do |
| 2022 | Crazy Love (2022) (TV Series) · as Kang Min |
| 2020 | Cheat On Me, If You Can (TV Series) · as Jang Seung-Cheol |
| 2020 | The Penthouse (TV Series) · as Detective |
| 2020 | Kairos (TV Series) · as Delivery Guy |
| 2020 | To All The Guys Who Loved Me (TV Series) · as Oh Si-Eon (writer) |
| 2020 | Dinner Mate (TV Series) · as Food Truck Owner |
| 2020 | Search Out · as Seong-Min |
| 2019 | Queen: Love And War (TV Series) · as Wal |
| 2019 | Killed My Wife · as Jung-Ho |
| 2019 | Hotel Del Luna (TV Series) · as Astronaut |
| 2019 | Abyss (TV Series) · as Park Dong-Cheol |
| 2019 | Race to Freedom: Um Bok Dong · as Lee Hong-Dae |
| 2018 | The Player (2018) (TV Series) · as Im Byung-Min |
| 2018 | Live (2018) (TV Series) · as Kang Nam-Il |
| 2018 | Welcome to Waikiki (TV Series) · as Tv Producer |
| 2017 | I am Not a Robot (TV Series) · as Man Cutting In Line |
| 2017 | Two Cops (TV Series) · as Yong-Pal |
| 2017 | Man Who Sets the Table (TV Series) · as Bong Myung-Tae |
| 2017 | Reunited Worlds (TV Series) · as Shin Ho-Bang |
| 2017 | My Sassy Girl (2017) (TV Series) · as Bang Se-Ho |
| 2017 | Man to Man (TV Series) · as Ceo Ji |
| 2017 | Star of the Universe (TV Series) · as Jo Yong-Gi |
| 2016 | W (TV Series) · as Park Soo-Bong |
| 2016 | My Little Old Boy (TV Series) |
| 2015 | Remember (TV Series) · as Section Chief Ahn |
| 2015 | High-end Crush (TV Series) · as Section Chief Heo |
| 2015 | Late Night Restaurant (TV Series) · as Tae-Soo |
| 2015 | Falling in Love with Soon Jung (TV Series) · as Oh Woo-Sik / "tinker Bell" |
| 2015 | Fool's Love (TV Series) · as Sin Cheong-Jae |
| 2015 | Kill Me, Heal Me (TV Series) · as Dr. Park Min-Jae |
| 2014 | Modern Farmer (TV Series) · as Yoo Han Cheol |
| 2014 | My Love, My Bride · as Ki-Tae |
| 2014 | Noble Woman (TV Series) · as Yoon Shin-Joong |
| 2013 | Answer Me 1994 (TV Series) · as Bang Sung-Jae |
| 2013 | Tough as Iron · as Jong-Soo |
| 2013 | Don't Look Back: The Legend of Orpheus (TV Series) · as Kim Dong-Soo |
| 2012 | Seo-Young, My Daughter (TV Series) · as Ho-Jeong's Blind Date Man |
| 2012 | Answer Me 1997 (TV Series) · as Bang Sung-Jae |
| 2011 | Paradise Ranch (TV Series) · as Secretary Lee |
| 2010 | Dr. Champ (TV Series) · as Heo Taek Woo |
| 2010 | KBS Drama Special (TV Series) · as Kwang Hyun |
| 2009 | Friend, Our Legend (TV Series) · as Kim Joong-Ho |
| 2024 | Handsome Guys (TV Series) · as Self |
| 2022 | Adventure by Accident (TV Series) · as Self - Traveler |
| 2020 | Hometown Flex (TV Series) · as Self |
| 2018 | Amazing Saturday (TV Series) · as Self |
| 2015 | Men on a Mission (TV Series) · as Self |
| 2013 | Real Men (2013) (TV Series) · as Self |
| 2013 | I Live Alone (TV Series) · as Self |
| 2011 | Saturday Night Live Korea (TV Series) · as Self |
| 2007 | Radio Star (TV Series) · as Self - Guest |
| 1986 | Golden Disc Awards (TV Series) · as Self - Presenter |