Katie Cassidy

as Dr. Kate Locke

as Sister Lu

as Karen Read

as Petra

as Ava Jensen

as Miller

as Laura Fenton

as Dawn Walsh

as Jackie

as Laurel Lance / Black Canary (voice)

as Sharon

as Laurel Lance(2 eps)

as Laurel Lance / Black Canary (voice)(5 eps)

as Laurel Lance / Siren X(1 ep)

as Laurel Lance(1 ep)

as Laurel Lance / Black Siren(1 ep)

as Suki

as Self(1 ep)

as Amanda Rowe

as Laurel Lance(117 eps)

as Black Siren(1 ep)

as Laurel Lance / Black Canary(10 eps)

as Laurel Lance / Black Siren(26 eps)

as Brooke(1 ep)

as Emma

as Kris Fowles

as Eleanor 'Ella' Simms(18 eps)

as Trish Wellington(13 eps)

as Amanda

as Jewel

as Juliet Sharp(12 eps)

as Jessie

as Self

as Apple

as Kelli Presley

as Samantha at 27 years old

as Dee Dee

as Tiffany

as Gabrielle(2 eps)

as Ruby(6 eps)

as Rebecca(1 ep)

as Young Candace 'C.D' DeLorenzo(1 ep)

as Zoe(4 eps)

as Self(1 ep)