Callan McAuliffe

Callan Ryan Claude McAuliffe (born 24 January 1995) is an Australian actor. He is known for his roles as Bryce Loski in "Flipped" and Sam Goode in "I Am Number Four". 
He appeared as young Jay Gatsby in the 2013 movie "The Great Gatsby". As of 2017, he appears on "The Walking Dead" as Alden.