K-pop Boy Groups

SURPRISE U Members Profile: Full Names, Ages, Heights, Weights and More

June 26, 2026 | By
SURPRISE U members are Yoon Jeonghyeok, Eun Haeseong, Ji Gunwoo, and Kim Hyunseo.
OriginSeoul, South Korea
DebutJuly 7, 2017
Number of Members4
MembersYoon Jeonghyeok
Eun Haeseong
Ji Gunwoo
Kim Hyunseo
Former MemberCha In Ha
Oldest MemberYoon Jeonghyeok
Youngest Member (Maknae)Kim Hyunseo
Tallest MemberKim Hyunseo
Shortest MemberYoon Jeonghyeok

SURPRISE U Members Profile

Yoon Jeonghyeok

SURPRISE U member Yoon Jeonghyeok
Full NameYoon Jeong Hyeok
BirthdayApril 19, 1992
BirthplaceN/A
Age34 years and 2 months old
Height5 feet 10 inches (177 cm)
Weight147 lbs (67 kg)
Zodiac SignAries
Chinese Zodiac SignMonkey
Instagram@wjdgur_

Eun Haeseong

SURPRISE U member Eun Haeseong
Full NameEun Hae Seong
BirthdayJuly 11, 1993
BirthplaceN/A
Age32 years and 11 months old
Height6 feet 0 inches (183 cm)
Weight147 lbs (67 kg)
Zodiac SignCancer
Chinese Zodiac SignRooster
Instagram@logos.888

Ji Gunwoo

SURPRISE U member Ji Gunwoo
Full NameJi Geon Woo
BirthdayDecember 18, 1996
BirthplaceN/A
Age29 years and 6 months old
Height6 feet 0 inches (182 cm)
Weight147 lbs (68 kg)
Zodiac SignSagittarius
Chinese Zodiac SignRat
Instagram@ji_geonwoo

Kim Hyunseo

SURPRISE U member Kim Hyunseo
Full NameKim Hyun Seo
BirthdayJuly 20, 1998
BirthplaceN/A
Age27 years and 11 months old
Height6 feet 1 inches (186 cm)
Weight147 lbs (68 kg)
Zodiac SignCancer
PositionMaknae
Instagram@__hyunseo

Former Member Profile

Cha In Ha

SURPRISE U former member Cha In Ha
Full NameLee Jae Ho
BirthdayJuly 15, 1992
BirthplaceDaegu, South Korea
Age33 years and 11 months old
Height6 feet 0 inches (183 cm)
Zodiac SignCancer
Instagram@chainha_715

Member Ages: Oldest to Youngest

MemberBirthdayAge
Yoon JeonghyeokApril 19, 199234 years, 2 months, 7 days old
Eun HaeseongJuly 11, 199332 years, 11 months, 15 days old
Ji GunwooDecember 18, 199629 years, 6 months, 8 days old
Kim HyunseoJuly 20, 199827 years, 11 months, 6 days old

FAQs

How many members are in SURPRISE U?

SURPRISE U is a 4-member K-pop boy group. The group consists of Yoon Jeonghyeok, Eun Haeseong, Ji Gunwoo, and Kim Hyunseo.

When did SURPRISE U debut?

SURPRISE U debuted on July 7, 2017, with their song I Do.

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