Yong Jun Hyung, also known as Joker, is a South Korean singer-songwriter, rapper, actor, dancer, record producer, and a member of the Korean boy group HIGHLIGHT. He debuted in 2009 as a member of the Korean boy group Beast. He changed his birth name Yong Jae Soon to his current name when he was in 6th grade.
He was once a member of the boyband Xing along with Kevin from U-KISS and was known as Poppin’ Dragon when he was promoting with them. He has featured in various singles as a rapper for artists such as ex-labelmates Hyuna’s "Change" and G.NA’s "I’ll Back Off So You Can Live Better", Young Jee’s "Crazy, that’s what love is", Navi’s "Go Again" and Wheesung’s "Words That Freeze My Heart".
In 2016, Beast members left their old label Cube Entertainment and formed Around Us Entertainment. Since then, the group promotes under their new name "Highlight". On March 14th, 2019, Yong announced he was leaving Highlight after he admitted to watching an illegal video sent to him by singer Jung Joon Young.
Yong enlisted in the military as an active soldier on April 2, 2019, at the recruit training center of the 23rd Infantry Division. During training, he had to have surgery due to a meniscus injury in his left knee. Rehabilitation treatments during active service did not improve his condition so he was transferred from active soldier to public service worker on June 15, 2020, and will continue in this capacity until he is discharged upon completing his military duties.
He was discharged on February 26, 2021. On November 15, 2021, he left Around Us Entertainment after his contract expired.
On March 7, 2022, He donated 10 million won to the Hope Bridge Disaster Relief Association to help the victims of the massive wildfire that started in Uljin, Gyeongbuk and has spread to Samcheok, Gangwon.