If you are searching for TUIDE Seoyeon age, the answer is simple: Seoyeon is 18 years old as of September 2026. She was born on March 4, 2008, in Sutaek-dong, Guri, Gyeonggi Province, South Korea. The young Korean singer became a member of TUIDE and officially debuted with the group on August 24, 2026.
Seoyeon has attracted attention not only because she is one of the newest faces in K-pop, but also because she is the younger sister of Jihyo, leader and member of the popular girl group TWICE. However, Seoyeon is now building her own identity as a member of TUIDE.
TUIDE Seoyeon Quick Facts
| Detail | Information |
| Full Name | Park Seo-yeon |
| Stage Name | Seoyeon |
| TUIDE Seoyeon Age | 18 years old |
| Birthday | March 4, 2008 |
| Birthplace | Sutaek-dong, Guri, Gyeonggi Province, South Korea |
| Nationality | South Korean |
| Profession | Singer, K-pop idol |
| Group | TUIDE |
| Debut | August 24, 2026 |
| Debut EP | TUNE & PLAY |
| Zodiac Sign | Pisces |
| MBTI | ENTP |
| Marital Status | Not publicly married |
| Estimated Net Worth | Not publicly disclosed |
How Old Is TUIDE Seoyeon in 2026?
TUIDE Seoyeon is 18 years old in 2026.
Her date of birth is March 4, 2008, meaning she turned 18 on March 4, 2026. Because TUIDE officially debuted on August 24, 2026, Seoyeon was already 18 when she made her professional debut.
For readers checking her age later in the year, the calculation is straightforward:
March 4, 2008 → March 4, 2026 = 18 years old.
This is the international age system used for the answer. Older Korean-age calculations could produce a different number, but South Korea moved to the international age system for legal and administrative purposes in 2023.
Seoyeon Age Timeline
| Date | Age |
| March 4, 2008 | Born |
| March 4, 2024 | 16 |
| March 4, 2025 | 17 |
| March 4, 2026 | 18 |
| August 24, 2026 | 18 — TUIDE debut |
| September 2026 | 18 |
| March 4, 2027 | 19 |
This makes Seoyeon’s age at debut particularly easy to establish: she was 18 when TUIDE officially debuted.
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When Is Seoyeon’s Birthday?
Seoyeon’s birthday is March 4, and her birth year is 2008. Her full birth name is reported as Park Seo-yeon (박서연).
She was born in Sutaek-dong, Guri, located in Gyeonggi Province, South Korea. Her zodiac sign is Pisces, and her Chinese zodiac sign is Rat.
Birthday information is one of the most frequently searched facts about newly debuted K-pop idols, especially when fans are trying to determine the ages of members in relation to one another. In Seoyeon’s case, her March 4 birthday places her firmly in the 2008-born idol generation.
Who Is Seoyeon From TUIDE?
Seoyeon is a South Korean singer and member of TUIDE, a seven-member girl group associated with ABD (A Bold Dream).
TUIDE consists of Seoyeon, Seohee, Elena, Jia, Saki, Seah and Yi Hani. The group attracted attention before its debut because its members come from different countries and backgrounds, giving the group an international lineup.
The group’s name is associated with the phrase “Tune the Tide,” reflecting its musical identity and concept.
TUIDE officially debuted on August 24, 2026, with its debut EP, TUNE & PLAY. The release features five tracks, including “ABD,” “SUN KISS,” “Echo,” “Flip-Flop Girl” and “GRLS.”
For Seoyeon, the release marked the beginning of her career as an officially debuted K-pop idol.
Seoyeon’s Early Life and Education
Seoyeon was born in Guri, Gyeonggi Province, South Korea, on March 4, 2008.
Available profile information lists her education as including Misa Middle School, Poongsan High School and Hanlim Arts School. Reports about her education indicate that she later attended Hanlim Arts School, one of the Korean schools known for educating students interested in entertainment and performing arts.
Her education is an important part of her biography because she entered the idol-training system while still young.
According to available profile information, Seoyeon joined PLEDIS Entertainment as a trainee in 2024. At the time, she was approximately 16 years old.
The trainee period is a major part of the K-pop system. Aspiring idols typically spend months or years developing skills in singing, dancing, performance, language and media appearances before receiving an opportunity to debut.
Seoyeon’s reported training period eventually led to her joining TUIDE.
Is Seoyeon Jihyo’s Sister?
Yes. Seoyeon is the younger sister of Jihyo from TWICE.
This family connection is one of the biggest reasons Seoyeon received attention even before her own debut.
Jihyo is a longtime member of TWICE, one of the most internationally recognized K-pop girl groups. Having an established K-pop idol in the family naturally created additional public interest in Seoyeon’s career.
However, Seoyeon’s career should be considered separately from Jihyo’s. She is now developing her own identity and professional experience through TUIDE.
Seoyeon also has another older sister, Lee Ha-eum, according to available profile information.
The relationship between Seoyeon and Jihyo has generated considerable fan interest, but Seoyeon’s debut with TUIDE represents her own path into the entertainment industry.
Seoyeon’s Career Journey
2024: Reported PLEDIS Trainee Period
Seoyeon’s reported trainee journey began with PLEDIS Entertainment in 2024.
At around 16 years old, she entered a highly competitive environment in which aspiring idols undergo intensive preparation before potentially debuting.
This stage helped establish the foundation for her later career with TUIDE.
2026: TUIDE Introduction
TUIDE began attracting attention in 2026 as preparations for the group’s debut became public.
The group was introduced as a seven-member girl group connected with ABD, giving Seoyeon the opportunity to enter the K-pop industry as part of a new-generation team.
Her background as a trainee, combined with the public interest surrounding her family connection to Jihyo, made her one of the members fans were particularly interested in learning about.
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August 2026: Pre-Debut Activities
Before the official debut, TUIDE held its TUIDE Exclusive Preview [PLAYGROUND] event in Seoul.
The showcase allowed the members to perform ahead of the official release and gave audiences an early opportunity to see the group’s performance style.
For Seoyeon, this was an important transition from trainee to performing artist.
August 24, 2026: Official Debut
The most important milestone in Seoyeon’s career came on August 24, 2026, when TUIDE officially debuted.
The group’s first EP, TUNE & PLAY, introduced TUIDE’s music to the public. The project includes five tracks and establishes the musical foundation for the group.
Seoyeon was 18 years old at the time of her official debut.
What Is Seoyeon’s Role in TUIDE?
Some online K-pop databases assign official positions such as main vocalist, lead dancer or rapper to group members. However, there is not enough consistently verified information to confidently assign Seoyeon a specific official position beyond her membership in TUIDE.
This is an important distinction when researching newly debuted idols.
Rather than repeating an unverified position, it is more accurate to describe Seoyeon as a member of TUIDE and a South Korean K-pop singer.
As the group continues its career, official information about individual roles and activities may become clearer.
Seoyeon’s Personality and Interesting Facts
Beyond her age and family connection, Seoyeon’s profile contains several details that give fans a better idea of her personality.
Her reported MBTI type is ENTP, and journaling is among her listed hobbies.
Some reported facts about Seoyeon include:
- She was born on March 4, 2008.
- She is from Guri, Gyeonggi Province.
- She is South Korean.
- She is the younger sister of TWICE’s Jihyo.
- She reportedly joined PLEDIS Entertainment as a trainee in 2024.
- Her zodiac sign is Pisces.
- Her reported MBTI is ENTP.
- She enjoys journaling.
- She has a cat named Bbuyo.
- She is a fan of TWICE.
- She has reportedly cited TWICE’s “CHEER UP” as an inspiration for her interest in becoming an idol.
- She debuted with TUIDE at age 18.
- Her favorite TUIDE song has reportedly been identified as “Echo.”
These details help explain why searches for Seoyeon extend beyond her basic age and birthday information.
Seoyeon Net Worth and Income
There is currently no reliable publicly disclosed figure for Seoyeon’s personal net worth.
Because TUIDE is a newly debuted group, it would be misleading to assign Seoyeon a specific dollar amount without documented information about her salary, contract terms, personal assets or individual earnings.
Potential income streams for a K-pop artist can include:
- Music sales
- Streaming revenue
- Live performances
- Concert activities
- Merchandise
- Brand endorsements
- Advertising campaigns
- Royalties
- Licensing
- Individual entertainment appearances
- Social-media partnerships
However, these categories should not be confused with confirmed personal income.
TUIDE’s debut EP TUNE & PLAY provides the group with commercial activity, but group-level sales cannot automatically be translated into Seoyeon’s personal net worth.
For that reason, the most accurate answer at present is not publicly disclosed.
Seoyeon’s Personal Life
Seoyeon has attracted considerable attention because of her family relationship with Jihyo, but most details about her private life remain limited.
She has not been publicly documented as married, so her marital status can reasonably be described as not married based on available public information.
There is also no reliably verified public information establishing a current romantic partner.
For a young idol who has only recently entered the public eye, separating confirmed information from fan speculation is especially important.
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Seoyeon Net Worth Growth Timeline
Because Seoyeon’s personal financial information has not been publicly disclosed, a numerical wealth-growth table would be speculative.
A more useful timeline is the development of her professional earning potential:
| Year | Career/Financial Stage |
| 2008 | Born |
| 2024 | Reported trainee period begins |
| 2025 | Continued preparation and training |
| 2026 | TUIDE member introduced |
| August 2026 | Official debut |
| 2026 onward | Potential music, performance, merchandise and endorsement opportunities |
This approach avoids presenting an invented net-worth figure as fact.
Major Achievements So Far
Although Seoyeon’s professional career is still at an early stage, several milestones stand out.
Becoming a TUIDE Member
Joining TUIDE is Seoyeon’s most important professional achievement to date. The group provides her first official platform as a K-pop artist.
Debuting at 18
Seoyeon officially entered the K-pop industry at age 18, after reportedly beginning her trainee journey at approximately 16.
Releasing TUNE & PLAY
Her debut EP TUNE & PLAY represents Seoyeon’s first official recorded release with TUIDE.
Beginning Her Own K-Pop Career
Her connection to Jihyo has naturally attracted attention, but Seoyeon’s TUIDE activities give her an opportunity to establish a separate professional identity.
Seoyeon’s Assets and Lifestyle
There is currently limited verified information about Seoyeon’s personal assets, property ownership or luxury purchases.
Because she is a newly debuted artist, claims about houses, cars, designer collections or other high-value possessions should not be presented as fact without reliable documentation.
The same principle applies to lifestyle claims. Public appearances, stage outfits and entertainment-company styling do not necessarily represent items personally owned by an idol.
For an accurate celebrity profile, it is better to distinguish professional styling from personal assets.
TUIDE Seoyeon Age: The Bottom Line
The answer to TUIDE Seoyeon age is 18 years old as of September 2026.
Seoyeon was born on March 4, 2008, in Sutaek-dong, Guri, Gyeonggi Province, South Korea. She reportedly entered the PLEDIS trainee system in 2024 and later became a member of TUIDE.
On August 24, 2026, she officially debuted with TUIDE’s EP TUNE & PLAY, making her 18 at the time of her debut.
Her connection to TWICE’s Jihyo has brought additional attention, but Seoyeon’s own career is now beginning with TUIDE. Since the group is still at the beginning of its professional journey, information about her individual earnings, assets and long-term achievements remains limited.
For now, her most firmly established milestones are her March 4, 2008 birthday, age 18, TUIDE membership and August 2026 debut.
Frequently Asked Questions About TUIDE Seoyeon
How old is TUIDE Seoyeon?
Seoyeon is 18 years old as of September 2026. She was born on March 4, 2008.
When is Seoyeon’s birthday?
Seoyeon’s birthday is March 4.
What is Seoyeon’s real name?
Her birth name is Park Seo-yeon (박서연), while she performs under the stage name Seoyeon.
Where was Seoyeon born?
She was born in Sutaek-dong, Guri, Gyeonggi Province, South Korea.
Is Seoyeon Jihyo’s sister?
Yes. Seoyeon is the younger sister of Jihyo, the leader and member of TWICE.
How old was Seoyeon when she debuted?
Seoyeon was 18 years old when TUIDE officially debuted on August 24, 2026.
When did TUIDE debut?
TUIDE officially debuted on August 24, 2026, with the EP TUNE & PLAY.
What is Seoyeon’s MBTI?
Her reported MBTI is ENTP.
What is Seoyeon’s zodiac sign?
Seoyeon’s Western zodiac sign is Pisces, because she was born on March 4.
What is Seoyeon’s nationality?
Seoyeon is South Korean.
What is Seoyeon’s net worth?
Seoyeon’s individual net worth has not been publicly disclosed. There is currently insufficient reliable information to provide a precise figure.
What is TUIDE Seoyeon’s debut song?
Seoyeon debuted as part of TUIDE’s TUNE & PLAY EP. The group’s title track is “SUN KISS.”
Final Takeaway
At just 18, Seoyeon is at the beginning of what could become a long K-pop career. Her March 4, 2008 birthday makes her 18 in 2026, and her debut with TUIDE on August 24 marked a major milestone in her journey from trainee to professional idol.
While her family connection to Jihyo has contributed to public interest, Seoyeon’s own TUIDE activities, debut music and developing career will ultimately define her place in the industry. As more official information emerges about TUIDE’s releases, performances, endorsements and individual activities, her profile will continue to evolve.
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