While some groups debut with the perfect lineup, others have made theirs even better by adding new members that truly complete them. Just take a look at these eight girl groups that all added more members after their debut.

1. Red Velvet

One of the girl groups best-known for adding a member is Red Velvet. The group debuted in August 2014 as a four-member act with Irene, Seulgi, Wendy, and Joy.

Red Velvet before Yeri | *SM Entertainment*

Then, in March 2015, Yeri debuted alongside them.

Red Velvet with Yeri | *SM Entertainment*

2. WJSN

WJSN first debuted with 12 members in February 2016: Seola, Xuanyi, Bona, EXY, Soobin, Luda, Dawon, Eunseo, Cheng Xiao, Meiqi, Yeoreum, and Dayoung.

WJSN before Yeonjung | *Starship Entertainment*

Then, after I.O.I disbanded as scheduled, 13th member Yeonjung joined the team in July 2016.

WJSN with Yeonjung | *Starship Entertainment*

3. CLC

CLC used to have just five members. Seunghee, Yujin, Seungyeon, Sorn, and Yeeun debuted together in March 2015.

CLC before Elkie and Eunbin | *Cube Entertainment*

Then, when they released their third mini-album in February 2016, Elkie and Eunbin joined them. Sadly, Elkie left the group earlier this year.

CLC with Elkie and Eunbin | *Cube Entertainment*

4. DIA

Eunice, Huihyeon, Jenny, Yebin, Eunjin, Seunghee, and Chaeyeon debuted together as DIA in September 2015.

DIA before Eunchae, Jueun, and Somyi | *MBK Entertainment*

In March 2016, they added a new member: Eunchae.

A further two members were revealed in April 2017: Jueun and Somyi. Seunghee, Eunjin, and Jenny have all since departed DIA.

DIA with Somyi and Jueun | *MBK Entertainment*

5. MOMOLAND

In 2016, Hyebin, Yeonwoo, Jane, Nayun, JooE, Ahin, and Nancy won the survival show Finding Momoland. They debuted as the original members of MOMOLAND in November 2016.

MOMOLAND before Daisy and Taeha | *MLD Entertainment*

The following year, two new members joined the group: Daisy and Taeha. Sadly, Daisy and Taeha are no longer members of MOMOLAND, and Yeonwoo also left the group in 2019.

MOMOLAND with Daisy and Taeha | *MLD Entertainment*

6. Cignature

Cignature debuted with seven members: Chaesol, Jeewon, Seline, Belle, Semi, Ye Ah, and Sunn. However, sadly for fans, Ye Ah and Sunn left for unknown reasons in April this year.

Cignature before Dohee and Chloe | *J9 Entertainment*

While their spots can never be filled, many are looking forward to seeing activities with the two new members added in June: Chloe and Dohee.

Cignature with Chloe and Dohee | *J9 Entertainment*

7. Wonder Girls

Wonder Girls underwent many lineup changes over the years. Originally, they debuted with Yeeun, Sunye, Sunmi, Hyuna, and Sohee.

Wonder Girls before Yubin and Hyerim | *JYP Entertainment*

However, Hyuna left soon after debut, and Yubin was added in her place.

Wonder Girls with Yubin | *JYP Entertainment*

Then, after Sunmi temporarily left the group in 2010, another new member was added: Hyerim. Sunmi later rejoined Wonder Girls in 2015, while Sohee and Sunye left around the same time.