Frankie Muniz was 21 in Walk Hard: The Dewey Cox Story when he played the character 'Buddy Holly'.
That was over 16 years ago in 2007.
Today he is 38, and has starred in 27 movies in total, 9 of those since Walk Hard: The Dewey Cox Story was released.
In Walk Hard: The Dewey Cox Story, I think Frankie Muniz looks: