Katherine Evelyn Anita "Katie" Cassidy (born November 25, 1986) is an American actress who has performed in The CW TV series Melrose Place and Supernatural, as well as the films Black Christmas, Taken, and A Nightmare on Elm Street, which was released in theaters April 30, 2010.[1] After The CW canceled Melrose Place she joined the cast of Gossip Girl. Cassidy was born in Los Angeles, California, the daughter of actor David Cassidy and model Sherry Williams, who first met and dated Cassidy in early 1970. Sherry and David separated but remained close friends. Cassidy's paternal grandparents were actors Jack Cassidy and Evelyn Ward. She grew up in Calabasas, California with her mother and stepfather, Richard Benedon, an ER physician. She has two older sisters, Jenna and Jamie. She also has a younger half brother Beau Cassidy. As a child, Cassidy took to tumbling, competing and eventually became a cheerleader for the California Flyers, a competitive team. She cheered as a freshman for Calabasas High School where she attended high school and graduated with honors in 2005. Info from Wikipedia