who plays the son in how i met your mother
David Henrie David Clayton Henrie (/ˈhɛnri/ HEN-ree; born July 11, 1989) is an American actor, producer, director, and screenwriter.[1] He is noted for playing Ted Mosby's future son Luke on How I Met Your Mother and Justin Russo in Wizards of Waverly Place, as well as starring in the films in Little Boy and Walt Before Mickey.