Oh yes Arrow fans, The Flash has arrived! But just who is Barry Allen and why does he look so familiar? Meet Grant Gustin--aka Barry Allen aka The Flash! Grant first made us swoon as Sebastian Smythe on Glee as a member of the rival choir, Warblers. We did some digging and here are some other deets about this 23-year-old you need to know... he's getting ready to star in the new movie Affluenza, loves his doggie and has major Amell ab envy! Yes, Grant admits to being a bit jealous of his Arrow co-star, Stephen Amell's abs! Find out more about this guy in this edition of CelebTV on the CW!