Gabrielle Union was 25 in She's All That when she played the character 'Katie'.
That was over 25 years ago in 1999.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 51, and has starred in 51 movies in total, 47 of those since She's All That was released.
In She's All That, I think Gabrielle Union looks: