UDTT

우당탕탕 소녀단

Name:: UDTT
Hangul:: 우당탕탕 소녀단
Fandom:: Unannounced
Debuted On:: Apr 29, 2025
Music Label:: SW Entertainment
Group Type:: Girl

About UDTT

UDTT (우당탕탕 소녀단) is a 5-member South Korean girl group under SW Entertainment. The group consists of Risako, Han Chaehee, Koo Hanna, Jessica, and Kwon Yejin. Jung Sena left the group on March 26, 2025. They released their first pre-debut single titled “𝐑𝐄𝐓𝐑𝐘” on December 11, 2024. They officially debuted on April 29, 2025, with their first single album, School Rush.

Created By

Naomii

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28 yo

Risako

Leader, Vocalist, Dancer

24 yo

Han Chaehee

Sub Vocalist

21 yo

Koo Hanna

Main Vocalist, Dancer

20 yo

Jessica

Member

19 yo

Kwon Yejin

Sub Vocalist, Maknae

Age Stats

Avg Age	23 years old
Oldest	Risako (28 years old)
Youngest	Kwon Yejin (19 years old)
Avg Gap	27.2 months
Next Birthday	Koo Hanna (Jan 20)
Last Birthday	Han Chaehee (Nov 13)

Height Stats

Tallest	Jessica (174 cm / 5ft 9in)
Shortest	Risako (161 cm / 5ft 3in)
Avg Height	167.7 cm / 5ft 6in
Avg Gap	6.5 cm / 2.6 in

Risako

Han Chaehee