Peter John Williams (born 31 December 1957) is a Jamaican-born Canadian actor. He is known for playing Apophis, a primary antagonist on Stargate SG-1.
The majority of his work has been in television, including his role as the primary villain Apophis in the first four seasons of Stargate SG-1 (plus a few appearances thereafter). However, he has also appeared on the big screen in films such as Catwoman and The Chronicles of Riddick. His brother Stephen is also in the entertainment business, and has directed several episodes of television shows including Dark Angel, Crossing Jordan, and Lost.
In 1995, two years prior to Stargate SG-1's premiere, Williams starred in the 1995 movie Jungleground with three other actors from the Stargate franchise: Torri Higginson (Elizabeth Weir), J. R. Bourne (Martouf), and Lexa Doig (Dr. Lam).
Peter also had a staring role inn the hit Canadian drama television series, Neon Rider. appearing in both the Pilot episode in 1989 and all 5 seasons from 1990 till the series conclusion in 1995.
In 2007, he played the lead, Gene Wright, in Frances-Anne Solomon's feature film A Winter Tale.