Peter Jackson was 40 in The Lord of the Rings: The Two Towers when he played the character 'Spear-Throwing Rohan Soldier (uncredited)'.
That was over 21 years ago in 2002.
Today he is 62, and has starred in 49 movies in total, 34 of those since The Lord of the Rings: The Two Towers was released.
In The Lord of the Rings: The Two Towers, I think Peter Jackson looks: