Jill Clayburgh was 23 in The Wedding Party when she played the character 'Josephine'.
That was over 55 years ago in 1969.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
In 2010 she died aged 66, starring in 49 films in her career, 48 of those after The Wedding Party was first released. If she were alive today she would be 80.
In The Wedding Party, I think Jill Clayburgh looks: