Katie Cassidy

Katherine "Katie" Evelyn Anita Cassidy (credited as Katie Cassidy) is an American actress. She portrays the Laurel Lance/Black Canary in a starring role for the first four seasons and a special guest starring role in the fifth season of Arrow. She also portrays Laurel Lance/Black Siren in a special guest starring role for the fifth season but she was promoted to a series regular in the sixth season of Arrow. She also portrayed both characters in a special guest starring role in the first and second seasons of The Flash and Laurel Lance/Black Canary in a special guest starring role for the first and second seasons of DC's Legends of Tomorrow.

Arrow

 * Starring: Season 1-4; Season 6-present


 * Special Guest Starring: Season 5

The Flash

 * Special Guest Starring: Season 1-2

Season 1

 * Who Is Harrison Wells? 

Season 2

 * Invincible

DC's Legends of Tomorrow

 * Special Guest Starring: Season 1-2

Season 1

 * Pilot, Part 1

Season 2

 * Aruba