Elenco Principal da Temporada 12

1. 

   Ellen Pompeo

   Meredith Grey

2. 

   Chandra Wilson

   Miranda Bailey

3. 

   Sandra Oh

   Cristina Yang

4. 

   James Pickens Jr.

   Richard Webber

5. 

   Katherine Heigl

   Izzie Stevens

6. 

   Justin Chambers

   Alex Karev

7. 

   T.R. Knight

   George O'Malley

8. 

   Sara Ramirez

   Callie Torres

9. 

   Isaiah Washington

   Preston Burke

10. 

    Patrick Dempsey

    Derek Shepherd

11. 

    Eric Dane

    Mark Sloan

12. 

    Kate Walsh

    Addison Montgomery

Convidados Especiais 25

1. 

   Paul Adelstein

   Dr. Cooper Freedman

2. 

   Diahann Carroll

   Jane Burke

3. 

   Christopher Lowell

   William 'Dell' Parker

4. 

   Bellamy Young

   Kathy

5. 

   D.W. Moffett

   Allan

6. 

   Jeff Perry

   Thatcher Grey

7. 

   Becky Wahlstrom

   Lisa

8. 

   Parisa Fitz-Henley

   Cami Davis

9. William Jackson

   Old Man (uncredited)

10. 

    Robin Hines

    Cute Girl

11. 

    Amy Brenneman

    Dr. Violet Turner

12. 

    Tim Daly

    Dr. Pete Wilder

13. 

    Tsai Chin

    Helen Rubenstein

14. 

    Stephanie Niznik

    Carol

15. 

    Mare Winningham

    Susan Grey

16. 

    Raphael Sbarge

    Paul

17. 

    Elizabeth Reaser

    Jane Doe / Ava

18. 

    David Anders

    Jim

19. 

    Taye Diggs

    Sam Bennett

20. 

    Merrin Dungey

    Naomi Bennett

21. Cameron Watson

    Rick

22. 

    Gary Hershberger

    Doug

23. 

    Shavon Kirksey

    Maya Bennett

24. 

    Mary Joy

    Voice (voice)

25. 

    Garon Grigsby

    Keith

Equipa Técnica 3