That was over 13 years ago in 2008.
Today he is 24, and has starred in 18 movies in total, 11 since The Boy in the Striped Pyjamas was released.
In The Boy in the Striped Pyjamas, I think Asa Butterfield looks:
The Boy in the Striped Pyjamas scores 7.7 out of 10 on The Movie Database.
Asa Butterfield's first acting role was as 'Andrew' in After Thomas, released in 2006 when he was 9.