Nathan Fillion was 42 in Justice League: Throne of Atlantis when he played the character 'Green Lantern / Hal Jordan (voice)'.
That was over 9 years ago in 2015.
Today he is 53, and has starred in 43 movies in total, 15 of those since Justice League: Throne of Atlantis was released.
In Justice League: Throne of Atlantis, I think Nathan Fillion looks: