Catherine Mary Stewart (born Catherine Mary Nursall on April 22, 1959 in Edmonton, Alberta) is a Canadian actress.
Stewart first notable role was as Kayla Brady on the soap opera Days of our Lives from 1981 to 1983. In 1984, she starred in two feature films, The Last Starfighter as Maggie Gordon and in Night of the Comet as Regina Belmont. She later played a leading role in teen comedy film Mischief.
In the mid-1980s, Stewart appeared in two highly-rated miniseries; Hollywood Wives (1985) and Sins (1986). She made guest appearances on television series such as Knight Rider, Hotel, Alfred Hitchcock Presents and The Outer Limits. She also starred in several made-for-TV movies such as Murder by the Book (1987), Passion and Paradise (1989), Perfect Harmony (1991) and Ordeal in the Arctic (1993). In 1989, she also appeared as female lead in the comedy film Weekend at Bernie’s.