Allison Hossack is a Canadian actress born on January 26, 1965, in Steinbach, Manitoba. She grew up in Killarney, Manitoba, where she participated in musical theatre productions while a student.

Initially, she began her studies at Brandon University as a piano major but later switched to voice and eventually drama. By the time she graduated, she was solely interested in acting. She later studied at the Banff School of Fine Arts.

Her career took off with her television roles, including a recurring role on "Another World" from 1989 to 1992, and main roles in shows like "Cobra" from 1993 to 1994, and "Hope Island" in 1999. She also starred in the Canadian TV series "Falcon Beach" in 2006.

Her guest appearances on television shows such as "Sliders," "Mysterious Ways," "Da Vinci's Inquest," "The Outer Limits," "Eureka," "Stargate SG-1," "Stargate: Atlantis," and "Fringe" have showcased her versatility.

She played Mrs. Oliver on the TV series "Reaper" and Deanna Campbell, the mother of Mary Winchester and the maternal grandmother of Dean and Sam Winchester, on the CW paranormal/horror series "Supernatural".

Allison Hossack is married to Jamie Ollivier, a writer and stand-up comic. They have one child together.

Her filmography includes movies such as "White Light" (1991), "Night Owl" (1993), "Dangerous Intentions" (1995), "The Hired Heart" (1997), "In the Doghouse" (1998), "Escape from Mars" (1999), "Anthrax" (2001), "Falcon Beach" (2005), "Ladies Night" (2005), "Saving Milly" (2005), "A Little Thing Called Murder" (2006), "A Job to Kill For" (2006), "Normal" (2007), "The Quality of Life" (2008), "The Gambler, the Girl and the Gunslinger" (2009), "Battle of the Bulbs" (2010), "Duke" (2012), "The Philadelphia Experiment" (2012), "Christmas Miracle" (2012), "Guidance" (2014), "Sometimes the Good Kill" (2017), "Radio Silence" (2019), "A Very Country Wedding" (2019), and "Angel Falls: A Novel Holiday" (2019).