Callum Keith Rennie (born 14 September 1960) is an English-born Canadian television and film actor. He started his career in Canadian film and television projects, where his portrayal of Stanley Raymond Kowalski in the TV series Due South was his first international success. After years acting in over ninety Canadian and international projects he became widely known for his portrayal of the Cylon Leoben Conoy in Battlestar Galactica, and following that, his role as record producer Lew Ashby in the Showtime TV series Californication.