Allison Williams was 25 in College Musical when she played the character 'Bianca'.
That was over 10 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 36, and has starred in 8 movies in total, 7 of those since College Musical was released.
In College Musical, I think Allison Williams looks: