Actors in both American Horror Story and Grey's Anatomy
110 actors have appeared in both American Horror Story and Grey's Anatomy, across 612 episodes. The most-credited is Frances Conroy, Moira O'Hara (Old), Myrtle Snow, Shachath in American Horror Story and Eleanor in Grey's Anatomy.
| Actor | In American Horror Story | In Grey's Anatomy | Eps | Eps |
|---|---|---|---|---|
| Frances Conroy | Moira O'Hara (Old), Myrtle Snow, Shachath | Eleanor | 26 | 1 |
| Adina Porter | Beverly Hope, Lee Harris, Sally Freeman | Dr. Ramsey | 21 | 1 |
| Mare Winningham | Ms. Hazel Evers, Alicia Spencer, Rita Gayheart | Susan Grey | 14 | 6 |
| Lauren Stamile | Wife | Nurse Rose | 1 | 12 |
| Brooke Smith | Dr. Gardner | Dr. Erica Hahn | 1 | 5 |
| Debra Monk | Virginia Harding | Louise O'Malley | 4 | 7 |
| Mitch Pileggi | Art | Larry Jennings | 2 | 9 |
| Leslie Grossman | Meadow Wilton, Ashleigh, Patricia Krenwinkel | Lauren Hammer | 9 | 1 |
| John Lacy | Mikey | Zack | 2 | 1 |
| Robin Weigert | Real Mama Polk, Coucilwoman Martha Edwards, Cynthia Potter | Karen Lawrence | 5 | 1 |
| Richard T. Jones | Det. Andy Hahn | Captain Dan | 7 | 1 |
| Colby French | Officer | Mr. Filson | 4 | 1 |
| Shannon Lucio | Diana Cross | Amanda | 2 | 3 |
| Clea DuVall | Wendy Peyser | Jennifer Robinson | 5 | 2 |
| Anton Starkman | Max Ellison | Harrison Meade | 6 | 9 |
| Marla Gibbs | Cassie Royale | Joyce Ward | 1 | 4 |
| Sarah Paulson | Billie Dean Howard, Lana Winters, Susan Atkins | Young Ellis Grey | 6 | 1 |
| Thomas Barbusca | Jimmy | Link McNeil | 3 | 5 |
| Troy Winbush | Newscaster | Darren Riley | 1 | 3 |
| Camille Chen | April Mayfield | Kerry Schultz | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.