Fan Casting Christopher in The Curious Incident of the Dog In the Night-time

To be honest, I don't know anything about this kid. I was just seeing Christopher as Asa Butterfield, however I have a huge problem with casting people in their mid 20s as teens, so I found an actor that resembles Asa. Asa would've been perfect for this role when he was younger. This kid has very similar eyes, and that was very important to me because I feel like Christopher wears a blank expression and the key to that is the eyes.