|Stage Name||Birth Name||Position||Birthday||Age||Height||Star Sign||C Y Sort descending||BT|
|Jiho 지호||Kim Jiho||Vocal, Visual||21||165 cm or 5'5"||Aries||Ox||A|
|Binnie 비니||Bae Yubin||Sub-vocal||20||160 cm or 5'3"||Virgo||Ox||O|
|Arin 아린||Choi Yewon||Sub-vocal, Maknae||18||163 cm or 5'4"||Gemini||Hare||O|
|Mimi 미미||Kim Mihyun||Dancer, Rapper||23||163 cm or 5'4"||Taurus||Pig||AB|
|YooA 유아||Yoo Yeonjoo||Vocal, Dancer||22||160 cm or 5'3"||Virgo||Pig||A|
|Seunghee 승희||Hyun Seunghee||Vocal||22||160 cm or 5'3"||Aquarius||Pig||B|
|Hyojung 효정||Choi Hyojung||Leader||23||160 cm or 5'3"||Leo||Dog||AB|
|JinE 진이||Shin Hyejin||Sub-vocal||23||160 cm or 5'3"||Aquarius||Dog||A|
Oh My Girl 오마이걸 is an eight-member female idol group formed by WM Entertainment. They debuted on April 21, 2015, with a self-titled mini-album.
Oh My Girl was publicized as the new sister group of label mate group B1A4. In March 29, 2015, teaser images of the eight members were released as well as their concept images. On April 20, the group released their first mini-album, Oh My Girl, which included the single "Cupid." They held their debut showcase the same day. They first performed the single on SBS MTV's "The Show."
On June 21, the group announced that they were currently preparing a new album. Their second mini-album, Closer, was released on October 7. The title track was promoted on music shows.
On December 11, Oh My Girl flew to LA for a photo shoot for their next album jacket and to perform at a special event, but could not get cleared by customs to enter the US. The group's management claimed that customs mistook the girls for underage prostitutes due to props and outfits for their special performance at an event on the Saturday of that week, and that they were detained for 15 hours. However, an official with U.S. Customs and Border Protection later stated that management was lying about the reason for being denied entry. Upon seeing the contents of the performers' luggage, customs officials determined the group was entering the U.S. to perform, not to go sightseeing as the group had claimed. As the group did not have the required P1 performance visa, they were denied entry. The customs official denied that the group was "detained" for 15 hours, noting that they were put on the first available flight back to Korea on the airline they traveled with.
Oh My Girl's third EP, Pink Ocean, was released on March 28, 2016, with the lead track "Liar Liar" and a pre-released single "Step by Step." On the same day, Oh My Girl announced their official fandom name, Miracle, at their comeback showcase for Pink Ocean and also on the group's V app. The group promoted "Liar Liar" and "Step by Step," a B-side written by B1A4's Jinyoung, on their comeback stages and at guerrilla concerts in Hongdae and Sinchon. In the beginning of May, the group promoted "Step by Step" for four days on the music programs "M Countdown," "Inkigayo," "Music Core," and "Music Bank."
On May 26, 2016, Pink Ocean was reissued as Windy Day with two new songs, "Windy Day" and "Stupid in Love," along with the Chinese version of "Liar Liar" (which was released in Pink Ocean exclusively on online streaming services in China). On August 1, they released a special summer album containing four remake songs, including Papaya's "Listen to My Word (A-ing)" featuring Skull and Haha.
On August 20 and 21, Oh My Girl held their first solo concert, Summer Fairytale, at the Blue Square Samsung Card Hall in Seoul. Tickets were available to purchase on July 22 and were sold out within three minutes, breaking the record for the fastest sold-out concert for a rookie group.
On August 25, WM Entertainment released a statement announcing JinE's temporary break from Oh My Girl's activities due to symptoms of anorexia. The remaining seven members will continue with Oh My Girl's activities while JinE rests and receives treatment with support from WM Entertainment.