OURBIRTHDAY

OURBIRTHDAY (아워벌스데이) or OBD (오비디) is a seven-member girl group produced by INNIT Entertainment (subsidiary label of JYP Entertainment). The group consists of Cho Hyejin, Kuk Chorok, Shin Hyewon, U, Baby, Achiraya, and Kilala. On July 22, 2026, Cho Hyejin, Baby, and Achiraya debuted with the first version of the pre-debut track “HUNGRY (Side A)”, and Kuk Chorok, Shin Hyewon, U, and Kilala debuted with the second version of the same pre-debut track “HUNGRY (B-side)”. The full group officially debuted with the title track “SQUEEZY” on August 19, 2026.

OURBIRTHDAY members height, age

Click on a member's name to scroll to their profile

Member	Height	Age
Cho Hyejin	163 cm	18 years
Kuk Chorok	163 cm	21 years
Shin Hyewon	160 cm	21 years
U	—	18 years
Baby	160.7 cm	17 years
Achiraya	164 cm	17 years
Kilala	160 cm	15 years

Debut Date: July 22, 2026
Name Meaning: When the members are together, every day feels as happy and special as a birthday.
Official Greeting: Today is our birthday! Hello, we are OURBIRTHDAY!
Room 1 (Single room): Hyewon
Room 2: Baby & Kilala
Room 3: Chorok, Hyejin, U & Achiraya
Fans: OURBIRTHDAY
Bilibili: OURBIRTHDAY
Douyin: OURBIRTHDAY

Official links

Group Stats

Average height: 161.8 cm
Tallest: 164 cm · Achiraya
Shortest: 160 cm · Shin Hyewon
Average age: 18.1 years
Oldest: 21 years · Kuk Chorok
Youngest: 15 years · Kilala

Members

Cho Hyejin

Stage Name: Cho Hyejin (조혜진)
Birth Name: Cho Hye-jin (조혜진)
Position(s): Leader, Main Dancer
Birthday: October 24, 2007
Age: 18 years
Zodiac Sign: Scorpio
Chinese Zodiac Sign: Pig
Height: 163 cm (5'4″)
MBTI Type: ENFJ
Nationality: Korean
Representative Color: Mantis Green
Representative Emoticon: 🍃 (Matcha)

Facts

She was born in Seongha-dong, Sangju, Gyeongsangbuk-do, South Korea.
Hyejin was a pre-debut member of DDD25, which disbanded in late 2025.
She competed on Street Dance Girls Fighter 2, eliminated in episode 4 (6th place with LACHICA).
She graduated from Hanlim (Practical Dance).
She dreamed of attending an arts high school after watching the drama Dream.
She enjoys karaoke with friends.
She has a dog named Kong.
She thinks brown hair doesn’t suit her.
She is reflective, thinking deeply about herself and how to support her members as leader.
Her specialty is dancing.
Hyejin’s favorite numbers are 5 and 24.
Her favorite season is winter.
Her favorite jacket is a denim one, gifted by her mom, who wore it at Hyejin’s age.
She joined INNIT Entertainment on Jan 24, 2025.
She participated in HUNGRY (SIDE A)’s single and promotions.

Kuk Chorok

Stage Name: Kuk Chorok (국초록)
Birth Name: Kuk Cho-rok (국초록)
Position(s): N/A
Birthday: July 28, 2005
Age: 21 years
Zodiac Sign: Leo
Chinese Zodiac Sign: Rooster
Height: 163 cm (5'4″)
MBTI Type: ESTP
Nationality: Korean
Representative Color: Opium Brown
Representative Emoticon: 🍪 (Cookie)

Facts

She was born in Gwacheon-si, Gyeonggi-do, South Korea.
She was a PLEDIS trainee (2018-2025), and a final candidate for the PLEDISNGG lineup.
She trained alongside NewJeans members during her trainee period.
Her name means “Green” in Korean.
She loves collecting cute stickers for her phone cases.
Her favorite season is autumn.
She dislikes rainy days.
She dislikes mint chocolate.
She has a warm, laid-back vibe.
She relieves stress with a good night’s sleep.
She remains calm and stable in any situation.
She enjoys walking down sunny streets wearing sunglasses.
Chorok’s surname is rare in South Korea.
Her hobbies are watching animations and playing baseball.
Her specialty is cutting fruit.
Her nickname is Roksil.
Her hashtags are #eyesmile, #clover, and #summergirl.
The dish she wants most is pizza with sweet potato cheese crust.
She participated in HUNGRY (SIDE B)’s single promotions.

Shin Hyewon

Stage Name: Shin Hyewon (신혜원)
Birth Name: Shin Hye-won (신혜원)
Position(s): Vocalist
Birthday: October 5, 2005
Age: 21 years
Zodiac Sign: Libra
Chinese Zodiac Sign: Rooster
Height: 160 cm (5'3″)
Blood Type: O
MBTI Type: ISFP
Nationality: Korean
Representative Color: Saffron Yellow
Representative Emoticon: 🧀 (Cheese)

Facts

She was born in Hwawon-myeon, Haenam-gun, Jeollanam-do, South Korea.
She has a younger brother.
She competed on R U Next?, eliminated in episode 7 (ranked 15th).
Her hobbies are listening to music and dancing.
She joined BE:LIFT in 2021 but left in 2024.
Hyewon studied dance at LAMF, PinkM, and ARoot Academies.
She blinks a lot habitually.
She has a dog named Byeol (“Star” in Korean).
She is close to ILLIT’s Minju and Wonhee.
She was in Little Cheer Girl under the stage name Rael.
She joined INNIT Entertainment in Oct 2025.
She makes funny faces when focusing.
She describes herself as a “homebody,” happiest in bed.
She loves fried chicken.
She calls herself a “journaling pro,” decorating her journal colorfully.
She participated in HUNGRY (SIDE B)’s single promotions.

U

Stage Name: U (유)
Birth Name: Kawasaki Yu (川崎優)
Position(s): Rapper
Birthday: August 21, 2008
Age: 18 years
Zodiac Sign: Leo
Chinese Zodiac Sign: Rat
Weight: 158 cm (5'1″)
MBTI Type: INFJ (Previously INFP)
Nationality: Japanese
Representative Color: Carmine Brown
Representative Emoticon: 🍮 (Tiramisu)

Facts

She was born in Chiba, Japan.
She competed on Universe Ticket (eliminated ep. 4) and THE DDANDDARA (ranked 3rd).
She was in pre-debut group DDD25 with Hyejin, which disbanded in late 2025.
She enjoys dancing to all kinds of music.
Her specialty is imagining unique ideas.
She customizes t-shirts when she can’t find clothes she wants.
Music is her lucky charm.
U has a dog.
She studied at NEXTinDANCE Academy and SONA Dance School.
She speaks Japanese, Korean, and English.
She is friends with ERG’s Ai.
She is very expressive and shows emotions openly.
She joined INNIT Entertainment on Jan 24, 2025.
Her nickname is Yu-chan.
Her birth name, Yu, means “kindness” in Japanese.
Her favorite season is autumn.
She enjoys meditating, even in noisy places.
She participated in HUNGRY (SIDE B)’s single promotions.

Baby

Stage Name: Baby (베이비)
Birth Name: Xie Jia-Xuan / Hsieh Jia-Xuan (謝佳軒)
Position(s): Main Dancer
Birthday: February 10, 2009
Age: 17 years
Zodiac Sign: Aquarius
Chinese Zodiac Sign: Ox
Height: 160.7 cm (5'3.5″)
MBTI Type: INTJ
Nationality: Taiwanese
Representative Color: Pink
Representative Emoticon: 🍒 (Cherry)

Facts

Baby was born in Kaohsiung, Taiwan.
She has an older sister.
She was a child model and Source Music trainee, part of their pre-debut group.
She has been close friends with UNCHILD’s Na Haeun since childhood.
She was in a cancelled U.SSO project.
She also goes by Jia or Jiaqi.
Her English alias Angela Baby was given by her mother, inspired by actress Angelababy.
She loves taking close-up selfies.
She likes Minions and greets fans with “Bello.”
She adds extra letters when typing words.
Her mother nicknamed her “Baby” because she looked like one.
Hyejin nicknamed her “Begwangbe” (베광베).
She loves babies and wants to care for one with members after debut.
She is free-spirited.
Her best dish is rolled omelet.
She has a cute yet hip vibe.
Though chic with a straight face, she looks adorable when smiling.
Her camera roll is full of expressive selfies.
She has kitten-like charm and resembles a cat.
She enjoys capturing special moments with her camera.
She wanted to be an idol after watching K-pop videos as a child.
Her hobbies are sleeping, watching movies, and filming creative content.
She participated in HUNGRY (SIDE A)’s single and promotions.

Achiraya

Stage Name: Achiraya (아치라야)
Birth Name: Achiraya Karwinwit (อชิรญา การ์วินวิท)
Position(s): Vocalist
Birthday: August 18, 2009
Age: 17 years
Zodiac Sign: Leo
Chinese Zodiac Sign: Ox
Height: 164 cm (5'4.5″)
MBTI Type: ESFP
Nationality: Thai
Representative Color: Medium Purple
Representative Emoticon: 🫐 (Blueberry)

Facts

She was born in Thailand.
She trained at ABYSS Entertainment.
Her nicknames include Achichi, Chichi, Achi, and Nong (“little sister” in Thai).
She was a backup dancer at BamBamAREA52inBKKDAY2 (2023).
Her gaze drops when her confidence dips.
Her best dish is egg fried rice, made with her mom’s recipe.
Hyejin calls her the “Vitamin” of the group.
She participated in HUNGRY (SIDE A)’s single and promotions.
She is a positive person.
Her hobbies are watching and filming mukbang videos.
Her energy drops when alone but shines with members.
Her expressions change instantly with her mood.
She has a habit of resting her chin when thinking.
She carries puppy keyrings on her bag.
She wanted to be an idol after watching BLACKPINK’s choreography videos.
Her specialties are eating a lot, filming rice cake videos, piano, and gymnastics.
Her hashtags are #megakong, #humanvitamin, and #positiveenergy.
After debut, she wants to perform on many stages and try airport fashion.
She participated in HUNGRY (SIDE A)’s single and promotions.

Kilala

Stage Name: Kilala (키라라)
Birth Name: Takashima Kirara (高島きらら)
Position(s): Maknae, Visual
Birthday: December 17, 2010
Age: 15 years
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Tiger
Height: 160 cm (5'3″)
MBTI Type: ENFP
Nationality: Japanese
Representative Color: Light Coral
Representative Emoticon: 🍓 (Strawberry)

Facts

She was born in Japan.
Her nicknames include Lala, Laraki, Kit-chan, and Pink Princess.
She wanted to be an idol after discovering TWICE’s social media, admiring their teamwork and auditioning successfully.
She trained under JYP Entertainment.
She is recognized for her dancing skills.
She is close to members of CIIU, a boy group under JYP China.
She placed third in classical ballet at the Japan Ballet Competition (2021).
Hyejin thinks Kilala resembles a raccoon due to her egg-shaped face and round eyes.
Her hobbies are shopping, chatting, and watching animations.
Her new hobby is teasing Hyejin.
She has a cute and bright vibe.
She loves pink and pink items.
Her eyes sparkle when she sees new makeup products.
She enjoys checking her smile in a hand mirror.
Her specialties are ballet and piano.
Her hashtags are #OURBIRTHDAYmaknae, #pinkprincess, and #strawberrycake.
She participated in HUNGRY (SIDE B)’s promotions.