Claim: Grant Gustin played the role of Blaine Anderson.
Evidence: He is known for his role as Barry Allen / the Flash -LRB- based on the DC Comics character of the same name -RRB- on the CW series The Flash and Arrow , both in the Arrowverse television franchise , and his role as Sebastian Smythe on the Fox series Glee.
Blaine Devon Anderson is a fictional character from the American musical comedy-drama television series Glee.
Played by Darren Criss , Blaine was introduced in the sixth episode of the second season as the openly gay lead singer of the Dalton Academy Warblers , a rival show choir to New Directions , the show 's primary musical group.