Gaby Hoffmann was 6 in Field of Dreams when she played the character 'Karin Kinsella'.
That was over 35 years ago in 1989.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 42, and has starred in 38 movies in total, 37 of those since Field of Dreams was released.
In Field of Dreams, I think Gaby Hoffmann looks: