KNK (크나큰; Keunakeun, lit. "great" or "to be great") is a three-member South… Read Full Bio ↴KNK (크나큰; Keunakeun, lit. "great" or "to be great") is a three-member South Korean boygroup under 220 Entertainment. It also stands for K-pop kNocK; "to knock on the door of the K-pop industry with their music". Formed by Inseong, Jihun, Heejun and Dongwon, they released their debut single album KNOCK on March 3, 2016. Original member Youjin left due health issues in 2018.

Dongwon joined the group on December 19, 2018 after KNK terminated their contracts with YNB Entertainment and moved to 220. They made their first comeback with the new lineup on January 7, 2019 with their 3rd single album LONELY NIGHT.

220 Entertainment announced the departure of member Seoham on September 30th, 2021, followed by the announcement of member Heejun's departure on January 13th, 2022.