A penny for your thoughts, Juli! :-D
This photo by the great Irving Penn (maybe you've seen his brother Arthur;s movies!) shows our heroine lost in thought and looking out into space. It's a perfect pose for such a gorgeous sundress.
Which is actually very unfortunate, for the April 1979 U.S. Vogue editorial this picture was taken from is about skin care.
But Juli Foster does have great skin. :-)