- She has a half-borther Efrem "Skip" Zimbalist III and a half-sister Nancy Zimbalist.
- She is Jewish.
- Stephanie is left-handed.
- Stephanie is a vegetarian.
- Stephanie is 5'5" (1.65 m).
- Stephanie: I've sown all the oats I want to sow. I know what I want, because I know what I don't want. It'd be nice if whoever it was had a master's in business. Vulnerability and humor are important to me. And integrity. But I enjoy my time alone.
- Stephanie: I'm not the sexiest thing in the world, I feel actors who have to *play* sexy lose all their sex appeal. When they start with the tongue and the heavy lids, it looks so ridiculous. I think you just have to be yourself.
- Stephanie: If I've learned one thing in life, it's you can never go back.
