Cheer Up! cast is including:
Jung Eun-ji as Kang Yeon-doo (12 episodes), Lee Won-keun as Kim Yeol (12 episodes), Chae Soo-bin as Kwon Soo-a (12 episodes), Ji Soo as Seo Ha-joon (12 episodes), Cha Hak-yeon as Ha Dong-jae (12 episodes), Park Hae-mi as Choi Kyung-ran (12 episodes), Kim Ji-seok as Yang Tae-bum (12 episodes), Lee Mi-do as Nam Jung-a (12 episodes), Koh Soo-hee as Choi Hyun-mi (12 episodes), Shin Jae-ha as Tae-pyung (12 episodes), In Gyo-jin as Im Soo-yong (12 episodes)