Katharine Isabelle (born November 2, 1981) is a Canadian actress. She has been described as a scream queen due to her roles in various horror films. She started her acting career in 1989, playing a cameo role in the television series MacGyver. She gained fame for the role of Ginger Fitzgerald in the films Ginger Snaps, Ginger Snaps 2: Unleashed and Ginger Snaps Back: The Beginning.
She played Tammy Sinclair in the revival series episode "Dark Child".