2018: Debut with I Am
On March 22, 2018, Cube Entertainment revealed a logo for its upcoming third girl group featuring Jeon Soyeon, a former participant of Produce 101 and Unpretty Rapstar 3, that will debut late April after PENTAGON's comeback with Positive. On April 8 the two first members were revealed, Yuqi and Miyeon through two profile photos on the group's Twitter.  On April 10, Shuhua and Soojin were revealed and two days later the last members Soyeon and Minnie were revealed. On April 18, Cube Entertainment revealed the group would make their debut on May 2 with the mini-album I Am.
On April 22 and 23, two series of six concept images were revealed. Video teasers of the members were released on April 25 and 26, alongside the album's track list with the title track "Latata" which Soyeon helped in the song's production. Finally on April 29, the preview of the album was released, the day after seven music video teasers were released: one for each member and a group teaser. The group then made their official debut on May 2, 2018 with the release of their mini album and title track.
On May 4, Cube Entertainment revealed that the group will be part of the first United Cube concert in five years. 2018 United Cube - One - will take place at Kintex in Ilsan on June 16 with BTOB, HyunA, CLC, PENTAGON and Yoo Seon Ho.
They take their first ever win with "Latata" on May 22, 2018 at The Show, 20 days after their debut. They are the second fastest group ever to have their first win on a music show after BLACKPINK. They won a total of three times during their promotion.
They made their first pictorial with "1st Look" on June 6. On July 24, they won their first ever award at the Korean Consumer Forum Brand of the Year Awards as the Female Rookie Idol of the Year. They also take part of two more pictorials for August, one with NYLON and one with The Star.
|Miyeon (미연)||Main Vocalist|
|Minnie (민니)||Lead Vocalist|
|Soojin (수진)||Main Dancer, Lead Rapper, Vocalist|
|Soyeon (소연)||Leader, Main Rapper, Lead Dancer, Vocalist, Face of the Group, Center|
|Yuqi (우기)||Lead Vocalist, Lead Dancer|
|Shuhua (슈화)||Vocalist, Visual, Maknae|
- I Am (2018)
- "Hann (Alone)" (2018)
- 2018 United Cube - One - (2018)
- I-Talk (2018-present)
Awards and nominations
|2018||Korean Consumer Forum Brand of the Year Awards||Female Rookie Idol of the Year||Won|
|MBC Plus X Genie Music Awards||Best New Female Artist||Won|
|Asia Artist Awards||Rookie Award||Won|
Music show wins
|2018||The Show||May 22||"Latata"|
|M Countdown||May 24|
|The Show||May 29|
|Show Champion||August 29||"Hann"|
|The Show||September 4|
|M Countdown||September 6|
- Soyeon was a contestant on Produce 101 and Unpretty Rapstar 3.
- Soyeon made her solo debut on November 5, 2017 before joining the group.
- In the music video for "Jelly", we can see a girl wearing a white fox mask. We will later know that the girl was Soojin.
- In her comeback on February 2018, there is again the same girl in the music video for "Idle Song" and also some clues for (G)I-DLE members (an earth glob with indicators of their birth places and radio fixed on "450" (for April 5, their reveal date).
- Miyeon is a former YG Entertainment trainee.
- The group name have some significations:
- "(G)" (여자) is for "girl" and "Idle" (아이들) for "children".
- The "I" in "I-DLE" is for the individuality and "DLE" the plural, so the girls have the same personality but their are related.
- Cube Entertainment was looking for a group name and after Soyeon sent the agency her song for her second digital single "Idle Song" it became the edited group's name "(G)I-DLE".
- ↑ Cube Reveals Logo For Upcoming Girl Group With Jeon Soyeon
- ↑ Reveal tweet for Yuqi
- ↑ Reveal tweet for Miyeon
- ↑ Reveal tweet for Shuhua
- ↑ Reveal tweet for Soojin
- ↑ Reveal tweet for Soyeon
- ↑ Reveal tweet for Minnie
- ↑ Cube Entertainment Confirms Debut Date For New Girl Group (G)I-DLE
- ↑ Cube Entertainment to hold 'United Cube' concert for the first time in 5 years!
- ↑ 10.0 10.1 (G)I-DLE take their 1st ever win since debut with 'LATATA' on 'The Show'!
- ↑ (G)I-DLE look trendy and fashionable for their first ever pictorial with '1st Look'
- ↑ 12.0 12.1 MOMOLAND, (G)I-DLE, The Boyz, And More Win 2018 Brand Of The Year Awards
- ↑ (G)I-DLE goes for an eerie look with 'NYLON'
- ↑ 14.0 14.1 Jeon So Yeon talks about making up (G)I-DLE's group name in summer vacation pictorial with 'The Star'!
- ↑ (G)I-DLE rumored to be coming back in mid-August
- ↑ Cube confirms (G)I-DLE's August comeback
- ↑ 'Music Bank' to come to Germany for the first time with EXO, Wanna One, (G)I-DLE, and more!
- ↑ Winners of 2018 MBC Plus X Genie Music Awards
- ↑ Winners Of 2018 Asia Artist Awards
- ↑ (G)I-DLE win #1 + Performances from May 24th 'M! Countdown'!
- ↑ (G)I-DLE take the trophy for second week in a row on 'The Show'!
- ↑ (G)I-DLE Takes 1st Win For “HANN” On “Show Champion,” Performances By Stray Kids, LOONA, And More
- ↑ (G)I-DLE take another win for 'Hann' on 'The Show'!
- ↑ (G)I-DLE Takes 3rd Win For “HANN” On “M Countdown,” Performances By Shinhwa, Sunmi, And More
- ↑ 25.0 25.1 Update: Cube’s New Girl Group (G)I-DLE Drops Highlight Medley For Debut Mini Album