Lee Young-seo

Lee Young-seo, known mononymously as Youngseo, is a South Korean singer under The Black Label. She is the maknae of the co-ed group ALLDAY PROJECT.

She first gained public recognition as a contestant on the 2023 survival show R U Next?, where she placed second and was selected for the original lineup of the girl group ILLIT. After leaving Belift Lab in early 2024, before ILLIT's debut, she has built a strong individual presence through high-profile fashion editorials and solo brand collaborations.

Lee Young-seo is known for work in acting across film and television. New Release currently presents 6 verified screen credits connected to this profile.

Selected work includes Men on a Mission (2015), The Seasons (2023), Salon Drip (2023), My Secretary (2025), R U Next? (2023), SUMBAKKOKJIL (2025). The recorded credits span 2015 to 2025, including 0 movies and 6 TV shows.

The filmography below lists available titles, release years and known roles. This profile is updated as additional verified information becomes available.