Actors in both ER and It's Always Sunny in Philadelphia
102 actors have appeared in both ER and It's Always Sunny in Philadelphia, across 518 episodes. The most-credited is David Hornsby, Strauss in ER and Matthew "Rickety Cricket" Mara in It's Always Sunny in Philadelphia.
| Actor | In ER | In It's Always Sunny in Philadelphia | Eps | Eps |
|---|---|---|---|---|
| David Hornsby | Strauss | Matthew "Rickety Cricket" Mara | 1 | 27 |
| Sandy Martin | Mrs. Zarian, Sister Helen | Mrs. Mac | 2 | 18 |
| Lance Barber | Howard | Bill Ponderosa | 1 | 11 |
| Shelly Desai | Cabbie | Hwang | 2 | 3 |
| Stuart McLean | X-Ray Tech, Mike Devore | Another Patron | 12 | 1 |
| Aisha Hinds | Administrator | Welfare Case Worker | 1 | 2 |
| Alejandro Patiño | Best Man | Mr. Juarez | 1 | 2 |
| Atticus Todd | Chris Sakabu | Big Strange Dude | 1 | 2 |
| John Mariano | Leonard | Johnny | 1 | 2 |
| Judy Greer | Tildie Mulligan | Ingrid "Fatty Magoo" Nelson | 1 | 2 |
| Kyle Davis | Kyle | Lil' Kevin | 1 | 2 |
| Alanna Ubach | Terry's Friend | Roxy | 1 | 1 |
| Dean Cameron | Edward | Dave Drisko | 1 | 1 |
| Eddie Mekka | Jenkins | Bobby Thunderson | 1 | 1 |
| Jim O'Heir | McKenna | Doctor | 1 | 1 |
| Kari Coleman | Mona | Margie | 1 | 1 |
| Marlon Young | Paramedic Thomas | Louis | 1 | 1 |
| Patricia Belcher | Ward Nurse | Judge | 1 | 1 |
| Peter Jacobson | Susan's molester | Michael Rotenberg | 1 | 1 |
| Ted Rooney | Dr. Tabash | Curator | 6 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.