Grant Gustin Thomas Grant Gustin (born January 14, 1990) is an American actor, singer, and dancer. He is known for his role as Barry Allen / the Flash (based on the DC Comics character of the same name) 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.
All songs by Grant Gustin

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