Rosanna Arquette was 17 in Having Babies II when she played the character 'Connie'.
That was over 47 years ago in 1977.
This was her first recorded movie acting credit (although may not technically be her first actual acting role).
Today she is 64, and has starred in 117 movies in total, 115 of those since Having Babies II was released.
In Having Babies II, I think Rosanna Arquette looks: