Bridgette Wilson-Sampras was 18 in Last Action Hero when she played the character 'Whitney / Meredith'.
That was over 30 years ago in 1993.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 49, and has starred in 23 movies in total, 22 of those since Last Action Hero was released.
In Last Action Hero, I think Bridgette Wilson-Sampras looks: