Actor Lee Yoo Jin, famous for his role as Woo Soo Han on the hit drama series 'Sky Castle,' is trying his hand at becoming an idol!

According to multiple media sources, the actor attended the first recording of 'Produce X 101' on March 4 as an individual (unsigned) trainee. However, sources have yet to confirm whether he is a rapping or singing performer. 

"Lee Yoo Jin has been trying a variety of methods to make the transition from actor to idol," press outlet XSports News reported. "Including applying as a contestant on 'Produce X 101.'"

Meanwhile, 'Produce X 101' is set to begin broadcast sometime in the first half of the year. The show will be hosted by actor Lee Dong Wook.