Started acting as a child, working in summer stock with the Straw Hat Players in Ontario.
Served as assistant director of England's National Theatre for six years, working under acting legend Laurence Olivier.
Was artistic director of the National Theatre School's English Acting Program in Montreal.
In 1989, he opened the William Davis Centre for Actors' Study—which counts Xena star Lucy Lawless among its former pupils—in Vancouver.
An avid water skiier, he has been Canadian national champion in his age division several times.
Contrary to his X-Files character, who was known as the "Smoking Man" or "Cancer Man," ex-smoker Davis is a Canadian Cancer Society spokesperson; he quit smoking in the 1970s and used herbal cigarettes on the show.
Published his memoir, Where There's Smoke....The Musings of a Cigarette Smoking Man, in 2011.
1998, Screen Actors Guild Awards — Outstanding Performance by an Ensemble in a Drama Series: Nominee
1997, Screen Actors Guild Awards — Outstanding Performance by an Ensemble in a Drama Series: Nominee
1996, Screen Actors Guild Awards — Outstanding Performance by an Ensemble in a Drama Series: Nominee
Barbara Ellison — Ex-significant Other
Melinda Davis — Daughter
Rebecca Davis — Daughter
Donald Davis — Cousin
Emmanuelle Herpin — Wife
Aubrey Davis — Grandfather
Marie Davis — Cousin
University of Toronto, Toronto, Ontario, Canada (BA in Philosophy, 1959); The London Academy of Music and Dramatic Art, London, England