Leven Rambin was 17 in Gigantic when she played the character 'Missy Thaxton'.
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 33, and has starred in 20 movies in total, 18 of those since Gigantic was released.
In Gigantic, I think Leven Rambin looks: