Youngseo (영서) is a South Korean singer under THEBLACKLABEL. She is a member of the co-ed group ALLDAY PROJECT and a former pre-debut member of ILLIT. She was a contestant on the survival show “R U NEXT?”.
Youngseo (ALLDAY PROJECT) Profile
| Stage Name | Youngseo (영서) |
| Birth Name | Lee Youngseo (이영서) |
| Occupation | Singer |
| Birthday | November 13, 2005 |
| Active Years | 2023–present |
| Age | 19 (in 2025) |
| Zodiac Sign | Scorpio |
| Height | N/A |
| Weight | N/A |
| Nationality | Korean |
| Blood Type | A |
| MBTI | ESTJ |
Youngseo (ALLDAY PROJECT) Facts:
– Youngseo was born in Seoul, South Korea.
– She went to Gyeonggi Elementary School and Yonggang Middle School.
– She is currently enrolled at Gaepo High School.
– Her elementary school was Kyonggi Elementary School.
– She is close with former R U Next contestants Jihyun and Jeemin .
– Pink is her favorite color.
– She was discovered and cast in front of her elementary school.
– She often touches her hair out of habit.
– According to herself, she is slow in nearly everything except for eating.
– Billie Eilish is her role model.
– She gets energetic when she eats. (‘I’LL LIKE IT!’ EP.1)
– She practised ballet in the past.
– Her dislikes include paprika, bell peppers, onions, pickles, garlic, and shrimp.
– Youngseo trained with NewJeans, for one year under ADOR.
– She also formerly trained under SM Entertainment.
– She has a habit of paying close attention to detail, especially for important matters.
– She is friends with Kim Eunkyul from Idol School and Sakurai Miu.
– She was previously a trainee at Source Music.
– Fans like to call her “Meow-seo.”
– She left ILLIT months before their debut and terminated her contract with Belift Lab on January 5, 2024.
– She was a announced as a member of the co-ed group ALLDAY PROJECT in June 2025.
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