Knock-Off

Kim Soo-hyun

as Kim Seong-joon

Jo Bo-ah

as Song Hye-jung

Yoo Jae-myung

as Kim Man-sik

Lee Jung-eun

as Park Ae-ja

Choi Gyu-ri

as Kim Seong-hee

Bang Hyo-rin

as Bae Noo-ri

Kim Hye-eun

as Jang Ji-soo

Go Gyu-pil

Kim Moo-yul

as Baek Jong-min

Kang Mal-geum

as Jegal Hyun-sook

Jeong Man-sik

as Lee Ki-bong

Kim Eui-sung

as Bae Pil-gu

Kwon Na-ra

as Moon Yu-bin

Park Se-wan

as Moon Da-bin

Jo Woo-jin