Mischa Barton was 10 in Lawn Dogs when she played the character 'Devon Tompkins Stockard'.
That was over 26 years ago in 1997.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 38, and has starred in 52 movies in total, 49 of those since Lawn Dogs was released.
In Lawn Dogs, I think Mischa Barton looks: