That was over 25 years ago in 1995.
Today he is 66, and has starred in 113 movies in total, 80 since Twelve Monkeys was released.
In Twelve Monkeys, I think Bruce Willis looks:
Twelve Monkeys scores 7.5 out of 10 on The Movie Database.
Bruce Willis' first acting role was as 'Extra (uncredited)' in Ein Guru kommt, released in 1980 when he was 25.