Kay Siu Lim or Lim Kay Siu (Chinese: 林继修, born 1960) is a Singaporean character actor who has appeared in several Asian films, notably TV films since the 1980s. His bald head and sinister demeanour in film and TV has made him an ideal villain. He may be more recognisable in western cinema due to his role as the North Korean villain in Night Watch set in Hong Kong where he starred alongside Pierce Brosnan and Alexandra Paul and as Prince Chowfa, King Mongkut's brother (Chow Yun-Fat) in Anna and the King.
He appeared in various episodes of the Singapore sitcom "Phua Chu Kang" as the title character's main rival, Frankie Foo, between 2002 and 2006.
His older brother, Lim Kay Tong, is also an actor and well-known television personality in Singapore