That was over 7 years ago in 2014.
Today he is 26, and has starred in 24 movies in total, 10 since The Fault in Our Stars was released.
In The Fault in Our Stars, I think Nat Wolff looks:
The Fault in Our Stars scores 7.6 out of 10 on The Movie Database.
Nat Wolff's first acting role was as 'Rusty Borgens' in Stuck in Love, released in 2013 when he was 18.