That was over 32 years ago in 1988.
Today he is 65, and has starred in 121 movies in total, 102 since Mississippi Burning was released.
In Mississippi Burning, I think Willem Dafoe looks:
Mississippi Burning scores 7.5 out of 10 on The Movie Database.
Willem Dafoe's first acting role was as 'Willy (uncredited)' in Heaven's Gate, released in 1980 when he was 25.