Actors in both Mad About You and Seinfeld
136 actors have appeared in both Mad About You and Seinfeld, across 356 episodes. The most-credited is Estelle Harris, Barry's Mother in Mad About You and Estelle Constanza in Seinfeld.
| Actor | In Mad About You | In Seinfeld | Eps | Eps |
|---|---|---|---|---|
| Estelle Harris | Barry's Mother | Estelle Constanza | 1 | 29 |
| John O'Hurley | Dr. VonDerphal | J. Peterman | 1 | 21 |
| Len Lesser | Uncle Arnold | Uncle Leo | 1 | 14 |
| Patrick Warburton | Sam | David Puddy | 1 | 10 |
| Spencer Klein | Ryan Devanow | Kid | 6 | 1 |
| Larry Miller | Lou Bonaparte | Doorman | 5 | 1 |
| Ping Wu | Kim | Ping | 1 | 4 |
| Hiram Kasten | Leon | Michael | 1 | 3 |
| Janeane Garofalo | Mabel Buchman | Jeannie Steinman | 2 | 2 |
| Sam Lloyd | Cousin David | Ricky | 2 | 2 |
| Regis Philbin | Regis Philbin | Miss America Pagent Announcer, Regis Philbin | 1 | 2 |
| Tracy Kolis | Ira's Friend | Kelly, Marlene | 1 | 2 |
| Wayne Wilderson | Bank Executive | Walter | 1 | 4 |
| Ana Gasteyer | Yoga Woman | Woman | 1 | 1 |
| Debra Mooney | Sister Dorothea | Mrs. Sweedler | 1 | 1 |
| Eric Christmas | Bernard | Haarwood | 1 | 1 |
| Erick Avari | Dr. Arzupian | Cabbie | 1 | 1 |
| Ernie Sabella | Maurice | Naked Man | 1 | 1 |
| Iqbal Theba | The Cabbie | Cabbie | 1 | 1 |
| John Fleck | Ricky | Attendant | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.