That was over 16 years ago in 2005.
Today he is 51, and has starred in 85 movies in total, 44 since King Kong was released.
In King Kong, I think Jack Black looks:
King Kong scores 6.6 out of 10 on The Movie Database.
Jack Black's first acting role was as 'Roger Davis' in Bob Roberts, released in 1992 when he was 23.