That was over 6 years ago in 2015.
Today he is 27, and has starred in 16 movies in total, 9 since Insurgent was released.
In Insurgent, I think Ansel Elgort looks:
Insurgent scores 6.2 out of 10 on The Movie Database.
Ansel Elgort's first acting role was as 'Tommy Ross' in Carrie, released in 2013 when he was 19.