Jemima Rooper was 10 in The Higher Mortals when she played the character 'Vicky'.
That was over 31 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 42, and has starred in 25 movies in total, 23 of those since The Higher Mortals was released.
In The Higher Mortals, I think Jemima Rooper looks: