Katherine Evelyn Anita Cassidy is an American television actress born in Los Angeles, California on November 25th, 1986. She is the daughter of 1970s music icon David Cassidy and Sherry Williams. Her first credited work in scripted television was playing a young CD in the "Oh Mother, Who Art Thou?" episode of the crime drama series The Division. Her first recurring role in a TV series was playing a character named Zoe in four episodes of the ABC Family series 7th Heaven. From 2007-2008, Katie played the demon Ruby in episodes of the CW Network series Supernatural. In 2013, she was cast in the role of defense attorney Laurel Lance in the superhero fantasy series Arrow.
