That was over 7 years ago in 2015.
Today he is 51, and has starred in 82 movies in total, 11 since The Martian was released.
In The Martian, I think Matt Damon looks:
The Martian scores 7.6 out of 10 on The Movie Database.
Matt Damon's first acting role was as 'Steamer' in Mystic Pizza, released in 1988 when he was 18.