Cathy Stewart
- Birthday: 4/2/1956
- Deathday: 8/9/1994
- Place of birth: Royan, France
- Fame for: Acting
- Also known as: Catherine Greiner, Kathy Stewart, Cathy Sterward, Cathy Steewart, Cathy Grenier, Cathy Greiner, Cathy Grener, Kate Baxter, Kathy Greiner, Kathy Grener, Marion Sautier
