Melissa Benoist was 18 in Tennessee when she played the character 'Laurel - age 18'.
That was over 16 years ago in 2008.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 35, and has starred in 14 movies in total, 13 of those since Tennessee was released.
In Tennessee, I think Melissa Benoist looks: