Dane DeHaan was 27 in The Amazing Spider-Man 2 when he played the character 'Harry Osborn / Green Goblin'.
That was over 10 years ago in 2014.
Today he is 38, and has starred in 29 movies in total, 12 of those since The Amazing Spider-Man 2 was released.
In The Amazing Spider-Man 2, I think Dane DeHaan looks: