Stephanie Beatriz was 31 in Short Term 12 when she played the character 'Jessica'.
That was over 11 years ago in 2013.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 43, and has starred in 19 movies in total, 18 of those since Short Term 12 was released.
In Short Term 12, I think Stephanie Beatriz looks: