Lee Seo Jeong

Name: Lee Seo Jeong
Native name: 이서정
Also Known as: Lee Seo Jung, 세이, Sei
Nationality: South Korean
Gender: Female
Born: January 7, 2000
Age: 26

Lee Seo Jeong, formerly known professionally as Sei, is a South Korean singer, dancer and former member of WEKI MEKI (위키미키). She graduated from Deos Middle and High School and is on a leave of absence from the Creative Writing program at Hanyang Women's University.

She made her debut in August 2017 as WEKI MEKI's vocalist and rapper with their first EP, "Weme". In 2021, she made her acting debut with the lead role in the web drama “The Tale of Chunhyang”.

In August 2024, Fantagio (판타지오) announced the group's disbandment as five members (including her) decided not to renew their contracts and left the company. She is currently an independent artist.

(Source: MyDramaList) Edit Biography

Year	Title	#	Role	Rating
2024	Our Love Triangle Korean Drama, 2024, 10 eps Son Min Joo (Support Role)	10	Son Min Joo Support Role	6.9
2021	Cheongchunhyang Jeon Korean Drama, 2021, 1 eps Chung Chun Hyang (Main Role)	1	Chung Chun Hyang Main Role	7.3
2021	Would You Like a Cup of Coffee? Korean Drama, 2021, 12 eps So Jung (Ep. 6) (Guest Role)	12	So Jung (Ep. 6) Guest Role	8.0
2019	Be Melodramatic Korean Drama, 2019, 16 eps [Girl group idol] (Ep. 3) (Guest Role)	16	[Girl group idol] (Ep. 3) Guest Role	8.3

Year	Title	Role	Rating
TBA	Sparks in April Korean Movie, 0000, (Unknown)	Unknown	0.0

Year	Title	#	Role	Rating
2022	Full Profiler Season 2 Korean TV Show, 2022, 12 eps (Ep. 8) (Guest)	12	(Ep. 8) Guest	0.0
2022	We&Me Korean TV Show, 2022, 2 eps (Regular Member)	2	Regular Member	8.7
2022	Listen Up Korean TV Show, 2022, 10 eps (Ep. 4) (Guest)	10	(Ep. 4) Guest	8.0
2022	GGULlog.zam: Homecoming Party Weki Meki Korean TV Show, 2022, 8 eps (Regular Member)	8	Regular Member	0.0
2021	Back to the Idol Season 2 Korean TV Show, 2021, 10 eps (Ep.5) (Guest)	10	(Ep.5) Guest	9.0
2021	Bread Is My Life Korean TV Show, 2021, 8 eps (Ep. 6) (Guest)	8	(Ep. 6) Guest	8.0
2021	Gossip Idle Korean TV Show, 2021, 75 eps (Ep. 18) (Guest)	75	(Ep. 18) Guest	8.2
2021	The Stage of Legends - Archive K Korean TV Show, 2021, 10 eps (Ep. 4) (Guest)	10	(Ep. 4) Guest	8.4
2020	Ontact Fan Meeting: Weki Meki Korean TV Show, 2020, 4 eps (Regular Member)	4	Regular Member	0.0
2020	Idol League Season 3 Korean TV Show, 2020, 66 eps (Ep. 3) (Guest)	66	(Ep. 3) Guest	8.4
2020	I'm Yours for 60 Minutes Korean TV Show, 2020, 10 eps (Ep. 2) (Guest)	10	(Ep. 2) Guest	5.7
2020	Good Girl Korean TV Show, 2020, 8 eps (Ep. 1-2) (Guest)	8	(Ep. 1-2) Guest	8.3
2020	Idol League Season 2 Korean TV Show, 2020, 23 eps (Ep. 13) (Guest)	23	(Ep. 13) Guest	7.7
2020	‏2020 Idol Star Athletics Championships Korean TV Show, 2020, 9 eps (Regular Member)	9	Regular Member	7.9
2019	Transonglation Korean TV Show, 2019, 67 eps (Ep. 9) (Guest)	67	(Ep. 9) Guest	8.3
2019	2019 Idol Star Athletics Championships Chuseok Special Korean TV Show, 2019, 6 eps (Regular Member)	6	Regular Member	7.8
2019	Q&A Machine Korean TV Show, 2019, 34 eps (Ep. 25) (Guest)	34	(Ep. 25) Guest	7.6
2019	Midnight Idol Korean TV Show, 2019, 345 eps (Ep. 215, 281) (Guest)	345	(Ep. 215, 281) Guest	8.2
2019	Idol Dabang Korean TV Show, 2019, 8 eps (Ep. 4) (Guest)	8	(Ep. 4) Guest	8.1
2019	School Attack 2019 Korean TV Show, 2019, 10 eps (Ep. 8) (Guest)	10	(Ep. 8) Guest	7.8
2019	We K-POP Korean TV Show, 2019, 22 eps (Ep. 10) (Guest)	22	(Ep. 10) Guest	8.3
2019	Run.wav Korean TV Show, 2019, 25 eps (Ep. 2) (Guest)	25	(Ep. 2) Guest	8.2
2019	Idol Lunch Box Korean TV Show, 2019, 10 eps (Ep. 1) (Guest)	10	(Ep. 1) Guest	0.0
2019	TMI NEWS Korean TV Show, 2019, 56 eps (Ep. 32) (Guest)	56	(Ep. 32) Guest	7.9
2019	2019 Idol Star Athletics Championships Korean TV Show, 2019, 4 eps (Regular Member)	4	Regular Member	7.9
2018	Brain-fficial Season 2 Korean TV Show, 2018, 41 eps (Ep. 28) (Guest)	41	(Ep. 28) Guest	8.0
2018	A Song for You Season 5 Korean TV Show, 2018, 10 eps (Ep. 4) (Guest)	10	(Ep. 4) Guest	7.7
2018	Quiz Room Korean TV Show, 2018, 32 eps (Ep. 15) (Guest)	32	(Ep. 15) Guest	8.0
2018	300 Korean TV Show, 2018, 5 eps (Guest)	5	Guest	8.4
2018	A Battle of One Voice: 300 Korean TV Show, 2018, 5 eps [Participant] (Ep. 2) (Guest)	5	[Participant] (Ep. 2) Guest	8.2
2018	Hidden Singer Season 5 Korean TV Show, 2018, 17 eps [Panelist] (Ep. 6) (Guest)	17	[Panelist] (Ep. 6) Guest	7.8
2018	Super TV Season 2 Korean TV Show, 2018, 12 eps (Ep. 5) (Guest)	12	(Ep. 5) Guest	8.6
2018	Idol Room Korean TV Show, 2018, 87 eps (Ep. 22) (Guest)	87	(Ep. 22) Guest	7.9
2018	Video Star Season 2 Korean TV Show, 2018, 179 eps (Ep. 164) (Guest)	179	(Ep. 164) Guest	7.3
2018	Idol League Korean TV Show, 2018, 56 eps (Ep. 38) (Guest)	56	(Ep. 38) Guest	8.4
2018	Super TV Korean TV Show, 2018, 12 eps (Ep. 11-12) (Guest)	12	(Ep. 11-12) Guest	8.7
2016	Fact iN Star Korean TV Show, 2016, 200 eps (Ep. 131) (Guest)	200	(Ep. 131) Guest	8.2
2016	Produce 101 Korean TV Show, 2016, 11 eps [Contestant] (Regular Member)	11	[Contestant] Regular Member	8.1
2015	Knowing Bros Korean TV Show, 2015, 600 eps (Ep. 261) (Guest)	600	(Ep. 261) Guest	8.6
2013	After School Club Korean TV Show, 2013, 671 eps (Ep. 279, 305, 369, 410) (Guest)	671	(Ep. 279, 305, 369, 410) Guest	7.8
2011	Weekly Idol Korean TV Show, 2011, 707 eps (Ep. 377, 423, 539) (Guest)	707	(Ep. 377, 423, 539) Guest	8.1
2011	Immortal Songs: Singing the Legend Korean TV Show, 2011, 800 eps (Ep. 349, 407, 449-450) (Guest)	800	(Ep. 349, 407, 449-450) Guest	8.2
2010	Hello Counselor Korean TV Show, 2010, 431 eps (Ep. 354) (Guest)	431	(Ep. 354) Guest	7.9
1998	Pops in Seoul Korean TV Show, 1998, 6000 eps (Guest)	6000	Guest	7.9

Top 12 upcoming dramas on every fan's watchlist

Editorials - Sep 19, 2026

From highly anticipated adaptations to gripping thrillers, the upcoming drama lineup has something for every fan. With teasers already dropping, these 12 dramas are generating plenty of buzz even before their premieres. Here are the titles to keep on your