Fiona Shaw was 26 in Sacred Hearts when she played the character 'Sister Felicity'.
That was over 39 years ago in 1985.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 65, and has starred in 50 movies in total, 48 of those since Sacred Hearts was released.
In Sacred Hearts, I think Fiona Shaw looks: