Katherine Evelyn Anita "Katie" Cassidy (born November 25, 1986) is an American actress who played Kelli Presley in Black Christmas remake. She has performed in The CW TV series Melrose Place, Supernatural and Gossip Girl alongside CBS Harper's Island, and on the films When a Stranger Calls, A Nightmare on Elm Street, Taken, Monte Carlo, and has roles in the upcoming films Fencewalker, The Scribbler, and the superhero television series Arrow.