Molly C. Quinn was 13 in Walk Hard: The Dewey Cox Story when she played the character 'Teen with Pinups'.
That was over 16 years ago in 2007.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 30, and has starred in 15 movies in total, 14 of those since Walk Hard: The Dewey Cox Story was released.
In Walk Hard: The Dewey Cox Story, I think Molly C. Quinn looks: