Jacki Weaver was 21 in The Naked Bunyip when she played the character 'Herself'.
That was over 54 years ago in 1970.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 77, and has starred in 54 movies in total, 53 of those since The Naked Bunyip was released.
In The Naked Bunyip, I think Jacki Weaver looks: