Youngseo (영서) is a South Korean singer under THEBLACKLABEL. She is a member of 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 | 20 (in 2025) |
| Zodiac Sign | Scorpio |
| Height | N/A |
| Weight | N/A |
| Nationality | Korean |
| Blood Type | A |
| MBTI | ESTJ |
Youngseo (ALLDAY PROJECT) Facts:
Early Life
– Youngseo was born in Seoul, South Korea.
– She went to Gyeonggi Elementary School and Yonggang Middle School.
– She practiced ballet when she was young.
Personal
– She is currently enrolled at Gaepo High School.
– She was discovered and cast in front of her elementary school.
– After leaving Beflift Lab, she sent a DM to THEBLACKLABEL on Instagram and they replied and scheduled an individual audition for which she passed. She was the last to join the company and the group. (DAY 1)
– Her first impression of Annie was that she was really scary but when Annie greeted her politely she realized she was really kind. (Studio Choom)
– She first met and saw Woochan a few years ago when they were trainees and he was already famous at the time so when she saw him practicing in the room, she did a 90 degree bow and walked past him but Woochan doesn’t remember the interaction. (Studio Choom)
– She is close with former R U Next contestants Jihyun and Jeemin and former Universe Ticket contestant Laura.
– Billie Eilish is her role model.
– Youngseo and Izna‘s Jeemin became friends during their trainee days at Source Music as both were born in 2005. They often grabbed meals together before heading to practice.
– She would choose 2NE1 over BIGBANG.
– If given the chance to be invisible, she’d rather stay visible.
– She said she would read comments from her fans anticipating when she is going to debut so she purposely kept a low profile.
– She admires SZA for her vocals but she listens to and looks up to many female artists.
– She said happiness to her is in reaching small goals throughout her day.
– She appeared on the youtube channel “Maririn TV” under the nickname “CherryGrapefruit”. (Maririn TV)
– Her personal motto is: “Let’s enjoy everything I do.”
– Her nicknames include Nyangseo (냥서) and Zero.
– She is friends with Kim Eunkyul from Idol School and Sakurai Miu.
– Fans like to call her “Meow-seo.”
– Her shoe size is 250mm (EU 39 / US 8.5).
– If reborn as an object, she’d want to be a pillow so she could bring comfort to others.
– She is close with ILLIT members.
Career
– Youngseo is the vocalist and maknae in ALLDAY PROJECT.
– She also formerly trained under SM Entertainment and Source Music.
– She left ILLIT months before their debut and terminated her contract with Belift Lab on January 5, 2024.
– She was announced as a member of the co-ed group ALLDAY PROJECT in June 2025.
– She auditioned for the “Super Interest” series when she was in 6th grade and made it to the final round.
– She was the second I’LL-IT member revealed.
– She trained with NewJeans, for one year under ADOR.
Likes & Dislikes
– Pink is her favorite color.
– Her dislikes include paprika, bell peppers, onions, pickles, garlic, and shrimp.
– Her favorite kpop group include 2NE1.
– She enjoys spending time in cat cafés and watching cat videos.
– She can eat a lot and loves spending her money on food.
– She doesn’t drink coffee and likes iced beverages.
– She loves mint chocolate and yogurt ice cream flavors.
– Summer is her favorite season.
– Her favorite number is 1.
– She loves to eat noodles in any form.
– Avatar 2 is her favorite movie.
Personality & Habits
– Youngseo often touches her hair out of habit and has a habit of saying “Wow.”
– According to herself, she is slow in nearly everything except for eating.
– She gets energetic when she eats. (‘I’LL LIKE IT!’ EP.1)
– She has a habit of paying close attention to detail.
– She feels most comfortable in her bed.
– On her days off, she wakes up around 3-4 PM.
Youngseo (ALLDAY PROJECT) Photos
Note: Learn more fun facts about her on ALLDAY PROJECT members profile!
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