Allison Williams was 25 in College Musical when she played the character 'Bianca'.
That was over 8 years ago in 2014.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 34, and has starred in 8 movies in total, 7 of those since College Musical was released.
In College Musical, I think Allison Williams looks: