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 7

1. 

   Michael Boatman

   Doug Kendry

2. 

   Hector Elizondo

   Carlos Torres

3. 

   Elizabeth Reaser

   Jane Doe

4. 

   Elisabeth Moss

   Nina Rogerson

5. 

   Catherine Dent

   Cathy Rogerson

6. 

   Roger Rees

   Colin Marlow

7. Judi Barton

   Board Member

Equipa Técnica 3