Official website: https://programs.sbs.co.kr/drama/penthouse
Lee Ji-ah
Shim Soo-ryun
Kim So-yeon
Cheon Seo-jin
Eugene
Oh Yoon-hee
Park Ho-san
Yoo Dong-pil
Uhm Ki-joon
Joo Dan-tae
Shin Eun-kyung
Kang Ma-ri
On Ju-wan
Baek Joon-ki
Bong Tae-gyu
Lee Gyu-jin
Yoon Jong-hoon
Ha Yoon-chul
Park Eun-seok
Logan Lee