Lee Se-young lahir pada 20 Desember 1992 di Bangbae-dong, Distrik Seocho, Seoul, Korea Selatan. Lee dilaporkan mengungkapkan dalam acara MBC Radio Star bahwa orang tuanya mengarahkannya ke dunia seni peran karena mereka takut ia akan diculik karena penampilannya. Selama awal dekade 1990-an, terdapat banyak insiden penculikan anak yang mengguncang Korea Selatan. Orang tua Lee membawanya masuk ke industri hiburan dengan harapan jika ia dikenal luas, hal itu akan mengurungkan niat para penculik.[7][sumber tepercaya?]
Lee Se-young bersekolah di SMP dan SMA Putri Seoumun. Ia kemudian berkuliah di Universitas Wanita Sungshin dengan mengambil jurusan Komunikasi Media, di mana ia dinobatkan sebagai Ratu Kampus (Queen of Campus).[8]
↑Lee, Min-ji (March 21, 2023). '열녀박씨 계약결혼뎐' 이세영 출연확정, 21세기로 온 조선 유교걸 [공식]['The Story of Park's Marriage Contract' Lee Se-young Confirmed Appearance, Joseon Confucian Girl Who Came to the 21st Century [Official]] (dalam bahasa Korea). Newsen. Diarsipkan dari versi aslinya tanggal March 21, 2023. Diakses tanggal March 21, 2023– via Naver.
↑Choi, Yoon-na (December 5, 2023). 이세영X사카구치 켄타로, '사랑 후에 오는 것들' 출연 확정 [공식][Lee Se-young x Kentaro Sakaguchi confirmed to appear in 'Things That Come After Love' [Official]] (dalam bahasa Korea). Sports Donga. Diakses tanggal December 5, 2023.
↑Yeon, Hwee-seon (June 13, 2024). 'MBC 딸' 이세영, 나인우 손잡고 '모텔 캘리포니아' 컴백 [공식]["MBC's Daughter" Lee Se-young joins hands with Na In-woo to make comeback with 'Motel California']. OSEN. Diarsipkan dari versi aslinya tanggal August 15, 2024. Diakses tanggal August 15, 2024– via daum.
↑Lee, Mi-ji (19 Juni 2025). '재혼 황후' 신민아X주지훈X이종석X이세영, 대본리딩 포착 "기대..책임감 느낀다”['The Remarried Empress' Shin Min-a X Ju Ji-hoon X Lee Jong-suk X Lee Se-young, tertangkap kamera sedang membaca naskah, "Saya bersemangat... Saya merasa bertanggung jawab"] (dalam bahasa Korea). Herald Pop. Diakses tanggal 17 Agustus 2025– via Naver.
↑"이세영 최우수상, 소감도 빛났다". n.news.naver.com (dalam bahasa Korea). Diakses tanggal 2022-01-01.
↑Hwang, Gyu-jun (August 31, 2022). '2022 에이판 스타 어워즈' 송중기-손석구-김수현-김태리-박은빈-신민아 등 수상 후보 공개[Nominees for the '2022 Apan Star Awards' including Song Joong-ki, Son Seok-gu, Kim Soo-hyun, Kim Tae-ri, Park Eun-bin, and Shin Min-ah revealed] (dalam bahasa Korea). Star Daily News. Diarsipkan dari versi aslinya tanggal August 31, 2022. Diakses tanggal August 31, 2022.
12Hwang, Hyo-yi (September 6, 2022). 강태오-박은빈'·'손석구-김지원'·'이준호-이세영' 베스트커플상은?[Best Couple Award for 'Kang Tae-oh - Park Eun-bin', 'Son Seok-gu-Kim Ji-won', 'Lee Jun-ho-Lee Se-young'?] (dalam bahasa Korea). Sports Kyunghyang. Diarsipkan dari versi aslinya tanggal September 6, 2022. Diakses tanggal September 6, 2022– via Naver.
↑Ahn, Byung-gil (April 11, 2022). 58회 백상예술대상 후보 공개...영광의 주인공은?[58th Baeksang Arts Awards nominations revealed... Who is the hero of glory?] (dalam bahasa Korea). Sports Kyunghyang. Diarsipkan dari versi aslinya tanggal May 10, 2022. Diakses tanggal April 11, 2022– via Naver.
↑Hwang, Soo-yeon (January 1, 2023). "'붉은 단심' 3번 거절했는데..." 이준·강한나·이혜리, 미니시리즈 우수상 [KBS 연기대상]["'Single Heart Red' was rejected 3 times..." Lee Joon·Hanna Kang·Hyeri Lee, Miniseries Excellence Award [KBS Drama Awards]] (dalam bahasa Korea). Xports News. Diarsipkan dari versi aslinya tanggal January 1, 2023. Diakses tanggal January 1, 2023– via Naver.
12Shin, Hyo-ryeong (September 5, 2023). KBS 대기획 '히든 어스', 제50회 한국방송대상 대상[KBS's 'Hidden Earth' wins 50th Korean Broadcasting Awards]. Newsis (dalam bahasa Korea). Diarsipkan dari versi aslinya tanggal November 4, 2023. Diakses tanggal November 4, 2023– via Naver.
↑Ahn, Tae-hyun (January 1, 2023). '이방원' 주상욱·'법대로' 이승기, 대상...눈물의 소감(종합) [KBS연기대상][Joo Sang-wook from 'Lee Bang-won' and Lee Seung-gi from 'The Law Cafe', Daesang...Impressions of Tears (Comprehensive) [KBS Drama Awards]] (dalam bahasa Korea). News1. Diarsipkan dari versi aslinya tanggal December 31, 2022. Diakses tanggal January 1, 2023– via Naver.
↑Cha, Hye-rin (December 30, 2023). [2023 MBC 연기대상] '연인' 남궁민, 이변 없이 대상 수상... "큐 사인이 가장 행복한 배우"[[2023 MBC Drama Awards] 'My Dearest' Namkoong Min wins the grand prize without any incidents..."Cue sign is the happiest actor"] (dalam bahasa Korea). MBC Entertainment. Diarsipkan dari versi aslinya tanggal December 30, 2023. Diakses tanggal December 30, 2023– via Naver.
↑Cha, Hye-rin (December 30, 2023). [2023 MBC 연기대상] '연인' 남궁민♥안은진, 시청자가 뽑은 '베스트 커플상'[[2023 MBC Drama Awards] 'My Dearest' Namkoong Min♥An Eun-jin, 'Best Couple Award' Voted by Viewers]. iMBC (dalam bahasa Korea). Diarsipkan dari versi aslinya tanggal December 31, 2023. Diakses tanggal December 31, 2023.
↑Kim, Yang-soo (May 7, 2024). 정우성·임영웅→TWS·키오프, '2024 브랜드 고객충성도 대상'[Jung Woo-sung, Lim Young-woong → TWS, Keyoff, '2024 Brand Customer Loyalty Award']. Joy News 24 (dalam bahasa Korea). Diarsipkan dari versi aslinya tanggal May 22, 2024. Diakses tanggal July 24, 2024.
↑Yoo, soo-yeon (May 29, 2025). '새출발' 아이들, 대상 '송 오브 더 이어' 받았다..3관왕 영예 (ASEA 2025)[종합]['New Depart' children won the grand prize 'Song of the Year'..3 gold medal honor (ASEA 2025)[comprehensive]]. OSEN (dalam bahasa Korea). Diakses tanggal May 29, 2025– via Naver.
↑2024 파워 셀러브리티 40 | 종합순위[2024 Power Celebrity 40 | Overall Rank]. Central City Centre. April 23, 2024. Diarsipkan dari versi aslinya tanggal April 29, 2024. Diakses tanggal April 29, 2024.
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