Amber Tamblyn was 10 in Rebellious when she played the character 'Deb'.
That was over 29 years ago in 1995.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 40, and has starred in 29 movies in total, 27 of those since Rebellious was released.
In Rebellious, I think Amber Tamblyn looks: