Helena Bonham Carter was 16 in A Pattern of Roses when she played the character 'Netty, The Past'.
That was over 40 years ago in 1983.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 57, and has starred in 103 movies in total, 98 of those since A Pattern of Roses was released.
In A Pattern of Roses, I think Helena Bonham Carter looks: