Thomas Grant Gustin (born January 14, 1990) is an American actor. He is best known for his roles as Barry Allen / The Flash on The CW series The Flash (2014–2023) as part of the Arrowverse and as Sebastian Smythe on the Fox series Glee. Trained in musical theater, his first major credit was as part of the 2010 national tour of West Side Story; he returned to theater in the original Broadway production of Water for Elephants, originating the starring role of Jacob Jankowski.
Gustin’s first known screen role came while he was still in high school in the film Rain (2004). In this student film, by director/producer Neil Grochmal, during his studies at Regent University. Gustin plays a young mute who dreams of a man’s tragic loss of his wife in a robbery, then later crosses paths with the man, stirring visions that help the man solve the mystery of who murdered his wife. Grochmal said Gustin showed raw talent and figured the youngster would be a future achiever in acting.