Guylaine St. Onge (June 1, 1965 – March 3, 2005) was a Canadian actress.

She was born in Saint-Eustache, Quebec.^[1] After working as a model and a dancer, she appeared in the Canadian television series Mount Royal in 1988.^[2] Other television series followed, including a recurring role on the syndicated western drama series Lonesome Dove: The Outlaw Years" (1995–96) and a lead role on the Showtime drama series Fast Track (1997–98).^[3] She also had episode guest appearances on The Outer Limits ("Bodies of Evidence"; season 3, episode 16), La Femme Nikita ("Threshold of Pain"; season 3, episode 12), and Mutant X ("Whiter Shade of Pale"; season 1, episode 11).

She played the role of Juda during the fifth season of the television series Earth: Final Conflict.^[3] She also had a role in the 2001 movie Angel Eyes.^[3]

In 2005, she died of cervical cancer at the age of 39.^[3]

Her ex-husband is Canadian actor David Nerman,^[2][3] who played "Albert", the manservant in several Philadelphia Cream Cheese commercials. They have a son, Aidan.^[3]