elcome to Katie Cassidy Online. to Katie Cassidy Online, This site is dedicated to the very talented Katie Cassidy. She is most known for her tv roles as Laurel Lance/Black Canary on the CW show "Arrow" and as Ella Simms in the remake of "Melrose Place" series and movies The Scribbler and Monte Carlo as well as the upcoming 2016 "The Wolves At The Door". Katie-Cassidy.us is the largest & most updated Katie Cassidy site on the web. Make sure to take a look around and have this be your #1 source for Miss. Cassidy. - Abby & Neide.