Louis Cheung is a Hong Kong singer, songwriter, and actor. He is an alumnus of The Hong Kong Academy for Performing Arts, majoring in acting. His first play was in 1997, and he has performed in a total of more than 20 stage plays, including the classic "A Streetcar Named Desire", in which he played Stanley Kowalski.

Hacken Lee Hak Kan (Chinese: 李克勤; Cantonese Yale: Lei5 Hak1kan4; pinyin: Lǐ Kèqín, is a Hong Kong singer, television host and actor, active since the 1980s. In 2013, Lee's song "House of Cards" swept multiple awards in many Hong Kong award ceremonies, including "World's Best Song" and "Broadcasting Index" in Metro's Awards. As of 2013, he has reached 14 times in receiving the "Outstanding Pop Singer Award" at RTHK's "Top Ten Chinese Gold Songs Awards" and has established an irreplaceable status in the music industry of Hong Kong and Asia.