Katie Cassidy is an up and coming actress known best for her roles as Ruby on <em>Supernatural</em> and some lady on <em>Melrose Place</em> and <em>Gossip Girl</em> . <hr/> Her latest role is that of Black Canary on the CW's <em>Arrow</em>, by which they mean Green Arrow. They just forgot the Green part because it's from the creators of <em>Smallville</em> , so they've never really dealt with comic books before. Now, on to the photos...