Son Seong Jun, now better known by his stage name Castle J, is a child actor and CF model who debuted in 2009. He became a trainee under TOP Media in 2015 and was part of the trainee boy dance group TOP Bro jr, competing in Feedback Competition Youth 2017 (2nd Place) and World of Dance Season 1 (Las Vegas crowd favorite). He subsequently debuted in 2020 as the leader and main rapper of the boy group MCND (Music Creates New Dream).
baby Castle J (MCND)
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