Girl group KARA member Nicole revealed a photo she took along with her '91 friends.

On Sunday she posted on her Twitter, "My friends who came to see me today!! They'll never let me down!" along with a photo.

In the photos are stars born in year 1991, including SHINee’s Key, 2AM’s Jinwoon, and MBLAQ’s Mir.

These starts are well known as the '91 line' and are continuing to build their friendship together.

Internet users who saw the photo commented, ‘This is a nice bunch,’ ‘They were hanging out together during the idol Olympics also,’ ‘So good to see them,’ ‘They look really close.’

Photo: Twitter