Sister of former child actor and journalist Joshua Murray.
Worked 3 times with her brother Josh: Cold Front (1989), The Last Winter (1989) and Knight Moves (1992).
In addition to the Ginger Snaps movie series, Katharine Isabelle and Emily Perkins have played sisters in Another Cinderella Story (2008).
She said that when she went to a pharmacy after a day of shooting Ginger Snaps (2000), the people there thought she'd been beaten up since she was still covered in fake blood.
Was originally asked to audition to play "Lori" in Freddy vs. Jason (2003), but when she arrived, director Ronny Yu asked her to audition for the role of "Gibb", claiming she would better suit a more liberal role. Katharine reluctantly accepted.