Julia Stiles was 14 in I Love You, I Love You Not when she played the character 'Young Nana's Friend'.
That was over 28 years ago in 1996.
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 48 movies in total, 47 of those since I Love You, I Love You Not was released.
In I Love You, I Love You Not, I think Julia Stiles looks: