is an American actress and fashion model who is best known for her television roles as Kaitlin Cooper
on the Fox
teen drama series The O.C.
, and currently stars as Thea Queen
on The CW
superhero drama series Arrow
She voiced Aqua in the English versions of the video games Kingdom Hearts Birth by Sleep , Kingdom Hearts 3D: Dream Drop Distance, the Final Mix-exclusive cutscenes of Kingdom Hearts: Birth by Sleep Final Mix (for Kingdom Hearts HD II.5 ReMIX) and Kingdom Hearts HD II.8 Final Chapter Prologue