Elaine Cassidy and Katie Cassidy in Harper's Island (2009)

Richard Burgi and Katie Cassidy in Harper's Island (2009)

Gina Holden and Katie Cassidy in Harper's Island (2009)

Katie Cassidy and Josh Segarra in Arrow (2012)

Paul Blackthorne and Katie Cassidy in Arrow (2012)

Jared Padalecki and Katie Cassidy in Supernatural (2005)

Katie Cassidy and Caity Lotz in Arrow (2012)

David Ramsey, Katie Cassidy, and Stephen Amell in Arrow (2012)

Katie Cassidy and Stephen Amell in Arrow (2012)

Katie Cassidy at an event for 72nd Golden Globe Awards (2015)

Paul Blackthorne, Willa Holland, and Katie Cassidy in Arrow (2012)

Michael Emerson, David Nykl, David Ramsey, and Katie Cassidy in Arrow (2012)

Paul Blackthorne, Michael Emerson, David Nykl, David Ramsey, Katie Cassidy, and Juliana Harkavy in Arrow (2012)

Paul Blackthorne, David Nykl, David Ramsey, and Katie Cassidy in Arrow (2012)

Paul Blackthorne, Katie Cassidy, and Juliana Harkavy in Arrow (2012)

Katie Cassidy and Juliana Harkavy in Arrow (2012)

Matthew Lillard, Tate Donovan, and Katie Cassidy in Grace (2018)

Brandon Routh and Katie Cassidy in Arrow (2012)

John Barrowman, Katie Cassidy, Stephen Amell, and Grant Gustin in Arrow (2012)

David Ramsey, Katie Cassidy, Stephen Amell, Colton Haynes, and Emily Bett Rickards in Arrow (2012)

Manu Bennett, David Ramsey, Willa Holland, Katie Cassidy, Stephen Amell, Colton Haynes, and Emily Bett Rickards in Arrow (2012)

Leighton Meester, Selena Gomez, and Katie Cassidy in Monte Carlo (2011)

Patrick John Flueger and Katie Cassidy in Before You Here (2007)

Harry Hamlin, Victor Webster, Claudette Mink, Jim Beaver, Richard Burgi, Elaine Cassidy, Dean Chekvala, Beverley Elliott, Chris Gauthier, Christopher Gorham, David James Lewis, Cameron Richardson, C.J. Thomason, Adam Campbell, Ben Cotton, Matt Barr, Sarah Smyth, Gina Holden, Katie Cassidy, Sean Rogerson, Brandon Jay McLaren, Cassandra Sawtell, Ali Liebert, Amber Borycki, and Anna Mae Wills in Harper's Island (2009)