All 57 actors in both Glee and Grey's Anatomy
57 actors have appeared in both Glee and Grey's Anatomy, across 588 episodes. The most-credited is Loretta Devine, Sister Mary Constance in Glee and Adele Webber in Grey's Anatomy.
| Actor | In Glee | In Grey's Anatomy | Eps | Eps |
|---|---|---|---|---|
| Loretta Devine | Sister Mary Constance | Adele Webber | 1 | 23 |
| Sarah Drew | Suzy Pepper | Dr. April Kepner | 1 | 13 |
| Samantha Marie Ware | Jane Hayward | Katie Rogers | 11 | 7 |
| Vivian Nixon | Andrea | Hannah Brody | 1 | 17 |
| Romy Rosemont | Carole Hudson-Hummel | Lea Seibert | 16 | 1 |
| Demi Lovato | Danielle "Dani" | Hayley May | 4 | 1 |
| Debra Monk | Will's Mother | Louise O'Malley | 1 | 7 |
| James Earl | Azimio | Evan | 15 | 1 |
| Eric Roberts | Fundraiser Coordinator | Dr. Robert Avery | 1 | 2 |
| Valerie Mahaffey | Rose Pillsbury | Donna Kaufman | 3 | 1 |
| Skylar Astin | Jean-Baptiste | Todd Earnes | 1 | 4 |
| Amy Hill | Dr. Chin | Joanne | 1 | 1 |
| Jane Galloway Heitz | Lillian Adler | Annie's Mother | 1 | 1 |
| Michael Hyatt | Joan Martin | Mariann Davidson | 1 | 1 |
| Mark Sinacori | Teacher | Hospital Staffer | 1 | 2 |
| Dana Davis | Tesla | Gretchen | 1 | 1 |
| June Squibb | Maggie Banks | Dr. Elsie Clatch | 1 | 1 |
| Rick Worthy | Dr. Howard | Ray Pelletier | 1 | 1 |
| Gina Hecht | Mrs. Puckerman | Mrs. Sutton | 2 | 1 |
| Jacy King | Janet | Whitney Englander | 5 | 1 |
| Adina Porter | Teacher | Dr. Ramsey | 1 | 1 |
| Bruce Beatty | Preacher | Jerry Hoffman | 1 | 2 |
| Jennifer Aspen | Kendra Giardi | Elaina | 3 | 1 |
| Keong Sim | Mike Chang Sr | Dr. Park | 2 | 1 |
| Paul Vogt | Herb Duncan | Aaron Mafrici | 1 | 1 |
| Titus Makin, Jr. | David | Rick Schultz | 1 | 1 |
| Jeff Doucette | NY Times Critic | Warren Sterman | 1 | 2 |
| Chad Buchanan | Bartender | Brian | 1 | 1 |
| Eve Gordon | Mrs. Fretthold | Mary Chapman | 1 | 1 |
| Jan Hoag | Roberta The Cashier | Wheezing Patient | 1 | 1 |
| Alan Heitz | Ronny | Applicant #1 | 1 | 1 |
| Assaf Cohen | Doctor | Aamir Elshami | 1 | 1 |
| Brent Jennings | Reverend | Charles Redford | 1 | 1 |
| Cheryl Francis Harrington | Nurse | Adrian Nelson | 1 | 1 |
| Dustin Ingram | Pizza Guy | Bruce Fuller | 1 | 1 |
| Emilee Wallace | Deaf Choir #11, Rival Choir Member #9 | Amelia Carver | 2 | 1 |
| Heather Mazur | Publicist | Erin Mason | 1 | 1 |
| Patricia Forte | Donna Landries | Mrs. Glass | 2 | 1 |
| April Grace | Mercedes' Mom | Greta's Sister | 1 | 1 |
| Gregg Henry | Russell Fabray | Dr. Gracie | 1 | 1 |
| Connie Ventress | Patron | Paula | 1 | 1 |
| Jeanette Brox | Assistant Stage Manager | Shelley | 1 | 1 |
| John Ainsworth | Barclay | Young Thatcher Grey | 2 | 1 |
| Mia Barron | Mother | Lauren Turner | 1 | 1 |
| Romel De Silva | Overweight Student | Screaming Patient | 1 | 1 |
| Sharon Muthu | Sikh | Fran | 1 | 1 |
| Barry Livingston | Manager | Wayne Sheehan | 1 | 1 |
| Lauren Boles | Toddler Rachel | Caroline Hodges | 1 | 1 |
| Rich Ceraulo Ko | Reverend | Brian | 1 | 1 |
| Telly Leung | Wes | Neal | 1 | 1 |
| Michael Segovia | Kid | Matt Ortega | 1 | 1 |
| Ashlee Brian | Derek | Paramedic Jamal | 1 | 1 |
| Adam Kolkin | Young Kurt | Ethan | 1 | 1 |
| Jack Foley | Lysander | Nervous Interviewee | 1 | 1 |
| Vanessa Mizzone | Realtor | Sheila Goodrich | 1 | 1 |
| Clint Culp | Teamster | Mr. Quaid | 1 | 1 |
| Jodi Harris | Mrs. Pentalla | Audrey Hobart | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.