All 50 actors in both Seinfeld and The Wonder Years
50 actors have appeared in both Seinfeld and The Wonder Years, across 295 episodes. The most-credited is Barney Martin, Morty in Seinfeld and Old Kevin Arnold in The Wonder Years.
| Actor | In Seinfeld | In The Wonder Years | Eps | Eps |
|---|---|---|---|---|
| Barney Martin | Morty | Old Kevin Arnold | 23 | 1 |
| Ben Stein | Shellbach | Mr. Cantwell | 1 | 11 |
| Richard Fancy | Mr. Lippman, Mr. Breckman | Dr. Valenti | 10 | 2 |
| Raye Birk | Mr. Pless | Mr. Diperna | 1 | 10 |
| Wendel Meldrum | Leslie | Miss White/Mrs. Heimer | 2 | 6 |
| Victor Raider-Wexler | Doctor | 'Pistol Pete' Pedermier | 4 | 1 |
| Biff Yeager | Mr. Heyman | Man, Ned | 1 | 2 |
| Edward Penn | Owen | Minister | 1 | 1 |
| Mark Boone Junior | OTB Patron | Repairman | 1 | 1 |
| Melora Walters | Jane | Waitress | 1 | 1 |
| Paula Marshall | Sharon | Bonnie Douglas | 1 | 3 |
| Lanai Chapman | Housekeeper | Miss Shaw | 2 | 1 |
| Al Ruscio | Manager | Mr. Harris | 2 | 1 |
| Eric Poppick | Maurice | Maitre D' | 1 | 1 |
| Jeremy Roberts | Chauffer | Trooper | 1 | 1 |
| Kimberley Kates | Diane | Carol | 1 | 1 |
| Scott Jaeck | Officer Vogel | Mr. Arlo Bottner | 2 | 1 |
| Carol Mansell | Mother | Jeanne | 2 | 1 |
| A.J. Langer | Abby | Mary Jo Genaro | 1 | 1 |
| Ellen Albertini Dow | Momma | Mrs. Tambora | 1 | 1 |
| Jack McGee | Ralph | Mr. Kaplan | 1 | 1 |
| Paul Gleason | Cushman | Arthur Jensen | 1 | 1 |
| Timothy Stack | Dwayne | Mr. Plentizer | 1 | 1 |
| David Byrd | Pharmacist, Roger | Jeweler | 2 | 1 |
| Nicholas Hormann | Calvin | Mr. Weber | 2 | 1 |
| Patrick Cronin | Farkus | Marvin Lutz | 2 | 1 |
| Allen Bloomfield | Polar Bear | Al Bloomfield | 1 | 2 |
| Earl Boen | Eulogist | Pastor | 1 | 1 |
| Gerry Bednob | Babu's Friend | Maharishi | 1 | 1 |
| James R. Sweeney | Aronson | Minister | 1 | 1 |
| O'Neal Compton | Earl | Zeke | 2 | 1 |
| Roy Brocksmith | Landlord | Weird Mr. Lemkur | 1 | 1 |
| Yunoka Doyle | Lydia | Debbie | 1 | 1 |
| Bret Anthony | Teen | Phil Stephens | 1 | 1 |
| David Brisbin | Client | Mr. Atkinson | 1 | 1 |
| Lou Cutell | Howard Cooperman, MD | Comic | 1 | 1 |
| Renee Faia | Alice | Peggy Kimball | 1 | 1 |
| Roger Nolan | The Chiropractor | Mr. Weisman | 1 | 1 |
| Miguel Pérez | Luis | Band Leader | 1 | 2 |
| Bruce Ed Morrow | Father Jessup | Mr. Clemens | 1 | 1 |
| Claude Earl Jones | Mr. Bevilaqua | Linzer | 1 | 1 |
| Danny Breen | Guy with Glasses | Ray McKinsey | 1 | 1 |
| Don Perry | Bill | Mr. Deeks | 1 | 1 |
| Mike Hagerty | Rudy | Clerk | 1 | 1 |
| Renée Humphrey | Audience Member | Hayley Green | 1 | 1 |
| Walt Beaver | Husband | Old Jeff Billings | 1 | 1 |
| Chet Nelson | Kid | Diner Kid #2 | 1 | 1 |
| Rebecca Staab | Kristin | Miss Lisa Farmer | 1 | 1 |
| Fitz Houston | Cop | Clerk | 1 | 1 |
| Jan Eddy | Fan #3 | Bus Driver | 1 | 1 |
Cast data from TVmaze, licensed CC BY-SA 4.0.