Danica McKellar was 14 in Camp Cucamonga when she played the character 'Lindsey Scott'.
That was over 34 years ago in 1990.
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 54 movies in total, 53 of those since Camp Cucamonga was released.
In Camp Cucamonga, I think Danica McKellar looks: