Joseph Gordon-Levitt was 16 in Halloween H20: 20 Years Later when he played the character 'Jimmy Howell'.
That was over 26 years ago in 1998.
Today he is 43, and has starred in 75 movies in total, 55 of those since Halloween H20: 20 Years Later was released.
In Halloween H20: 20 Years Later, I think Joseph Gordon-Levitt looks: