About
Katherine Evelyn Anita Cassidy, known as Katie Cassidy, is an American actress who initially gained recognition in horror films. She starred in *When a Stranger Calls*, *Black Christmas*, and *Supernatural*, establishing herself as a scream queen. Cassidy later transitioned into leading roles in television series such as *Harper's Island* and *Melrose Place*. She also had a recurring role in the popular teen drama *Gossip Girl*.
Career Timeline
Horror Film Roles
Appears in horror films like When a Stranger Calls.
Supernatural Debut
Joins the cast of Supernatural, boosting her exposure.
Melrose Place Reboot
Stars in the Melrose Place reboot, but the show is short-lived.
Arrow Cast
Cast as Laurel Lance / Black Canary in Arrow.
Arrowverse Crossover
Black Canary features in several Arrowverse crossover events.
The Flash Return
Cassidy returns to film one of the final episodes of the flash.
Continued TV Work
Continues to work in television, maintaining a steady career.
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Last updated: February 21, 2026