Zoe Kazan, the 28-year-old star and screenwriter of the slyly subversive new romantic comedy Ruby Sparks, skips the sunglasses. The July sun is blazing down on the Boston Public Garden as we walk toward the famous Swan Boats, but she doesn't even squint. During conversation she tends to lock in your gaze with her huge, expressive blue eyes--which, with her heart-shaped face, give her the slightly otherworldly, out-of-the-past aura of a silent-film star like Louise Brooks or Lillian Gish.
Another sign that she's a visitor from another time and place: she listens to her parents. She is one of two daughters...