Mara Wilson was 5 in Mrs. Doubtfire when she played the character 'Natalie Hillard'.
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 36, and has starred in 12 movies in total, 11 of those since Mrs. Doubtfire was released.
In Mrs. Doubtfire, I think Mara Wilson looks: