Sung Young Jae, known professionally as Young J, is a South Korean dancer and member of crew JUST JERK (저스트 절크). He graduated from Baekam High School and later obtained a bachelor's degree in Dance from Dong Seoul University.

In December 2010, he became the co-founder and leader of the urban hip-hop dance and choreography crew JUST JERK, taking on the role of main choreographer at all major events. The crew's performances are based primarily on hip-hop but combine other dance elements and music genres. They became well-known in the country in 2016, when they won the Body Rock Dance Competition in the United States, thanks to their precise synchronization. The following year, they were contestants in season 12 of "America's Got Talent" but were eliminated in the quarterfinals. Then, in 2018, the performed at the opening ceremony of the 2018 Winter Olympics in Pyeongchang. In 2022, they entered Mnet's "Street Man Fighter" and ended up as the show's winner.

However, in early 2024, allegations of him dating a minor and a new recruit of the dance crew were made. A few weeks later, he admitted that he was dating a dancer 13 years younger than him, but was adamant that they had only started dating when she became a legal adult. They are now engaged but the controversy has not disappeared. In the mean time, he remains part of the crew and also a teacher at Just Jerk Academy.

(Source: MyDramaList) Edit Biography