Yoo Young Seo

Name: Yoo Young Seo
Native name: 유영서
Also Known as: Youngseo, Yoo Yeong Seo
Nationality: South Korean
Gender: Male
Born: June 13, 2002
Age: 24

Yoo Young Seo is a South Korean singer, dancer, and former member of BAE173 (비에이이173), A SIX (에이식스), and DOUBLE 0NE (더블원). He graduated from Konkuk University Affiliated High School and is enrolled in the Broadcasting and Entertainment program at Global Cyber University.

He made his debut in November 2020 as BAE173's main vocalist with their first mini-album, "Intersection: Spark". However, as the group has not been able to promote as much, PocketDol Studio (포켓돌스튜디오) allows him to participate in survival shows.

In January 2024, the agency decided to make him part of the co-ed group A SIX. They released the digital single, "Love is All Lies". They have not released any new material since then.

In June 2025, the agency decided to launch a new project group combining some members of BAE173 and FANTASY BOYS. He re-debuted as part of DOUBLE 0NE with their first mini-album, "Xpert".

His contract with PocketDol Studio expired on June 30, 2026, concluding his activities with BAE173.

(Source: MyDramaList) Edit Biography

Year	Title	#	Role	Rating
2025	2025 Idol Star Athletics Championships Korean TV Show, 2025, 3 eps (Regular Member)	3	Regular Member	7.6
2025	Workdol Season 4 Korean TV Show, 2025, 25 eps (Ep. 4) (Guest)	25	(Ep. 4) Guest	7.8
2024	Starlight Boys Korean TV Show, 2024, 10 eps (Ep. 6) (Guest)	10	(Ep. 6) Guest	6.3
2024	Project 7 Korean TV Show, 2024, 12 eps [Contestant] (Regular Member)	12	[Contestant] Regular Member	7.3
2023	Peak Time Korean TV Show, 2023, 11 eps [Contestant / BAE173] (Regular Member)	11	[Contestant / BAE173] Regular Member	8.3
2022	Jaechan's Dream Korean TV Show, 2022, 193 eps (Ep. 29) (Guest)	193	(Ep. 29) Guest	8.4
2020	Idol House Korean TV Show, 2020, 18 eps (Ep. 15-16) (Guest)	18	(Ep. 15-16) Guest	8.1
2019	Midnight Idol Korean TV Show, 2019, 345 eps (Ep. 328) (Guest)	345	(Ep. 328) Guest	8.2
2019	5 Minutes to Six Korean TV Show, 2019, 425 eps (Ep. 320, 419) (Guest)	425	(Ep. 320, 419) Guest	8.0
2019	Lunch Attack Korean TV Show, 2019, 570 eps (Ep. 690) (Guest)	570	(Ep. 690) Guest	6.0
2011	Weekly Idol Korean TV Show, 2011, 707 eps (Ep. 486) (Guest)	707	(Ep. 486) Guest	8.1
2004	M Countdown Korean TV Show, 2004, 950 eps [Performer] (Ep. 692, 705-706, 747-748, 767-768) (Guest)	950	[Performer] (Ep. 692, 705-706, 747-748, 767-768) Guest	8.2