David Henrie is an American actor, television writer, and producer. He is known for playing Ted Mosby's future son on How I Met Your Mother, Justin Russo in Wizards of Waverly Place and Larry on That's So Raven. He plays Jimmy Mone in Scream 5 and plays Cyrus Ross, aka Number 4, in 0 to 10 and He also plays Kirk Xavier in Blair Witch 3:The Legend of Elly Kedwards and Blair Witch 4:The Execution of Rustin Parr and Blair Witch 5:The Coffin Rock.