That was over 35 years ago in 1986.
Today he is 59, and has starred in 99 movies in total, 91 since Platoon was released.
In Platoon, I think Forest Whitaker looks:
Platoon scores 7.6 out of 10 on The Movie Database.
Forest Whitaker's first acting role was as 'Charles Jefferson' in Fast Times at Ridgemont High, released in 1982 when he was 21.