Simon Lui Yu-Yeung (Chinese: 雷宇扬; born 8 July 1964), also known as Simon Loui, is a highly prolific Hong Kong-based actor famous for starring in many low-budget and/or horror films since the early 1990s. He began drawing attention when he was featured in the "Troublesome Night" movie series. He starred in 30+ films in 1999 alone, and began writing scripts the same year, starting with Last Ghost Standing.