Lindsay Lohan was 8 in Be Cool About Fire Safety when she played an uncredited character.
That was over 28 years ago in 1996.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 37, and has starred in 40 movies in total, 37 of those since Be Cool About Fire Safety was released.
In Be Cool About Fire Safety, I think Lindsay Lohan looks: