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다이아

Girl group · MBK Entertainment · since 2015· 3rd generation

DIA

다이아

MBK's girl group that lent Chaeyeon to I.O.I and waited almost three years for a first win, with "Woo Woo" on The Show. Group activity stopped when the contracts ran out in September 2022.

12years on 14 September 2027 · in 305 days

Their story

MBK's next girl group

MBK Entertainment, the company behind T-ara, launched DIA in September 2015 with a full album rather than a single. Do It Amazing, led by "Somehow", gave the group its backronym: DIA is short for diamond, but also for the album title. The line-up started changing almost at once: leader Seunghee left in the spring of 2016 to concentrate on acting.

Two members on Produce 101

In early 2016 Chaeyeon and Cathy, who later promoted as Huihyeon, stepped away to compete on Mnet's Produce 101. Chaeyeon made the final eleven and spent the year in I.O.I alongside her DIA work. Back home the group added Eunchae for "On the Road" that June, held a first solo concert at Christmas and opened the fan club AID. In April 2017 Jueun and Somyi joined for the album YOLO, which reached No. 3 on the Gaon album chart.

Writing their own b-sides

Success on the music shows still took time. After a break of almost a year, Summer Ade and its Miami bass title track "Woo Woo" finally brought a first win on The Show in August 2018, nearly three years after the debut. The same album showed another side of the group: Jueun, Yebin and Huihyeon each co-wrote one of its b-sides. "Woowa" followed in 2019 with a retro look.

How it ended

In 2020 DIA moved to Pocketdol Studio and released Flower 4 Seasons as a five-member unit. Two quiet years followed. For the seventh anniversary, on 14 September 2022, all six remaining members came back with "The blinding past". Three days later the contracts expired, and Korean media reported the end of the group. Pocketdol asked fans to follow each member in her new start, and Chaeyeon was by then also working as an actor, in MBC's The Golden Spoon.

Timeline

  1. Debut with the album Do It Amazing and "Somehow".

  2. Second album YOLO and "Will You Go Out with Me?", the first release with Jueun and Somyi.

  3. First music show win, on The Show, with "Woo Woo".

  4. The contracts with Pocketdol Studio expire, and Korean media report the end of the group.

  5. 13 November 2026

Start with these 5 songs

  1. On the RoadTitle track of Happy Ending, Eunchae's first release with the group.2016
  2. Will You Go Out with Me?The first song with Jueun and Somyi, from the album YOLO.2017
  3. Woo WooThe Miami bass track that gave them their first music show win.2018
  4. WoowaThe retro follow-up, from the EP Newtro.2019
  5. The blinding pastReleased on their seventh anniversary, three days before the contracts ended.2022

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In the Fan Chart

The Fan Chart on The Crowd adds up every fan's top 10. Here is where DIA stands.

    Add DIA to your setlist

    For AID

    Eunice

    Name
    Not confirmed yet
    Born
    Not confirmed yet

    A debut member from 2015 and one of the five who promoted Flower 4 Seasons in 2020.

    HuihyeonLeader

    기희현
    Name
    Ki Hui-hyeon
    Born
    Not confirmed yet

    Debuted as Cathy, competed on Produce 101 and co-wrote the 2018 b-side "Blue Day".

    Yebin

    Name
    Not confirmed yet
    Born
    Not confirmed yet

    Co-wrote the b-side "Sweet Dream" and sang "Seoraksan in October" with Somyi in 2017.

    Chaeyeon

    Chaeyeon

    정채연
    Name
    Jung Chae-yeon
    Born
    Not confirmed yet

    Joined I.O.I through Produce 101 in 2016. Acted in MBC's The Golden Spoon in 2022.

    Eunchae

    Eunchae

    Name
    Not confirmed yet
    Born
    Not confirmed yet

    Joined in June 2016, introduced at first under the name Chaewon.

    Jueun

    Name
    Not confirmed yet
    Born
    Not confirmed yet

    Joined in April 2017 and co-composed the 2018 b-side "Take Me".

    Portraits, cropped from Wikimedia Commons: Chaeyeon, November 2025: TV10, CC BY 4.0 · Eunchae, June 2018: Irfan410, CC BY-SA 4.0

    Quick answers

    When did DIA debut?

    On 14 September 2015, with the album Do It Amazing and "Somehow".

    Who were the members of DIA?

    The final line-up was Eunice, Huihyeon, Yebin, Chaeyeon, Eunchae and Jueun. Eunchae joined in 2016 and Jueun in 2017. Seunghee, Eunjin, Jenny and Somyi were members at earlier stages.

    What is the DIA fandom called?

    AID. The first generation of the official fan club opened in late 2016, and its launch was held at Yes24 Live Hall that December.

    Was Chaeyeon of I.O.I in DIA?

    Yes. Jung Chae-yeon was picked for I.O.I through Produce 101 in 2016 and rejoined DIA after I.O.I's group promotions. Huihyeon, then called Cathy, also competed on the show.

    Are DIA still together?

    Not as an active group. Their contracts with Pocketdol Studio expired on 17 September 2022, and Korean media reported that DIA would disband. Three days earlier they released "The blinding past" for their seventh anniversary.

    Know your DIA?Six K-pop questions a day in the Daily, and a collectible card for every finished set.

    Play the Daily

    Last checked 30 October 2026. Spotted a mistake? Tell us.

    Sources