Karl Urban was 30 in The Lord of the Rings: The Return of the King when he played the character 'Éomer'.
That was over 20 years ago in 2003.
Today he is 51, and has starred in 39 movies in total, 30 of those since The Lord of the Rings: The Return of the King was released.
In The Lord of the Rings: The Return of the King, I think Karl Urban looks: