Elijah Wood was 21 in The Lord of the Rings: The Return of the King when he played the character 'Frodo'.
That was over 20 years ago in 2003.
Today he is 43, and has starred in 86 movies in total, 53 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 Elijah Wood looks: