That was over 8 years ago in 2013.
Today he is 23, and has starred in 8 movies in total, 3 since After Earth was released.
In After Earth, I think Jaden Smith looks:
After Earth scores 5 out of 10 on The Movie Database.
Jaden Smith's first acting role was as 'Christopher' in The Pursuit of Happyness, released in 2006 when he was 8.