Actors in both It's Always Sunny in Philadelphia and NCIS: Los Angeles
77 actors have appeared in both It's Always Sunny in Philadelphia and NCIS: Los Angeles, across 510 episodes. The most-credited is Gregory Scott Cummins, Luther McDonald, Donald McDonald, Bill in It's Always Sunny in Philadelphia and Rick Pargo in NCIS: Los Angeles.
| Actor | In It's Always Sunny in Philadelphia | In NCIS: Los Angeles | Eps | Eps |
|---|---|---|---|---|
| Gregory Scott Cummins | Luther McDonald, Donald McDonald, Bill | Rick Pargo | 10 | 1 |
| Peter Jacobson | Michael Rotenberg | Special Prosecutor John Rogers | 1 | 10 |
| Jeff Kober | Creepy Guy | Harris Keane | 1 | 9 |
| Renée Felice Smith | Belle | Intelligence Analyst Penelope "Nell" Jones | 1 | 8 |
| Aisha Hinds | Welfare Case Worker | Chief Investigator Ava Wallace | 2 | 3 |
| Andrew Leeds | Jason | NCIS Tech Operator John Booker | 1 | 4 |
| Alejandro Patiño | Mr. Juarez | Day Laborer | 2 | 1 |
| Kyle Davis | Lil' Kevin | Bobby Asher | 2 | 1 |
| Kari Coleman | Margie | Jillian Rome | 1 | 1 |
| Kim Hawthorne | Susan | Dr. Diane Church | 1 | 1 |
| Mercer Boffey | Shane | Douglas Fisher | 1 | 1 |
| Regan Burns | Swim Club Manager | Brad Ross | 1 | 1 |
| Christine Horn | Cop | Elliot Reynolds | 1 | 2 |
| Marcuis Harris | Pimp (Pepper Jack) | Little Keen | 2 | 1 |
| Eddie Shin | Moderator Mike | Matthew Ogilvie | 1 | 3 |
| Audrey Wasilewski | Nurse | Meredith Huxley | 1 | 1 |
| Caitlin Carmichael | Samantha | Gia Michelle | 1 | 1 |
| Cheryl Texiera | Jane Ponderosa | Motel Manager | 2 | 1 |
| Dominic Burgess | Psycho Pete | Herman Cooper | 1 | 1 |
| Elaine Kao | Professor Lee | Xue-Li | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.