David Clayton Henrie (/ˈhɛnri/ HEN-ree; born July 11, 1989) is an American actor, television writer, director and producer. He is noted for playing Ted Mosby's future son Luke Mosby on How I Met Your Mother, Justin Russo in Wizards of Waverly Place and Larry on That's So Raven along with Rudy Ising in Walt Before Mickey.