Mnet's new idol survival program 'Idol School' is garnering attention for its students who used to be�trainees under the Big 3 agencies.

On the first episode aired on July 13, 'Idol School' welcomed the 41 incoming students, including aviation major Yoo Ji Na, baby face Choo Won Hee, TWICE's Tzuyu look-alike Lee Na Kyung, and the youngest student, 14-year-old Park Sun.

Trainees from the Big 3 agencies were also present. YG Entertainmen's 6-year trainee Lee Seo Yeon, SIXTEEN's Park Ji Won, JYP Entertainment trainee Lee Chae Young, and SM's Seo Hae Ri were among the participants of he program.�

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Child star Lee Young Yoo also appeared, commenting, "I've always dreamed of becoming an idol star."

Did you tune in to the first episode of 'Idol School'?