Seinfeld Season 8 cast ages
How old were Seinfeld actors in Season 8?
Jerry Seinfeld was 42, Julia Louis-Dreyfus was 35, Jason Alexander was 36 years old on 1996-09-19, the Season 8 premiere date.
These are actors’ ages on the original broadcast date, not their characters’ ages or ages during filming. This is a selected series cast comparison, not a verified list of appearances in “The Foundation”.
Selected cast ages on 1996-09-19
| Actor | Character | Birthday | Age on air date |
|---|---|---|---|
| Jerry Seinfeld | Jerry Seinfeld | 1954-04-29 | 42 years |
| Julia Louis-Dreyfus | Elaine Benes | 1961-01-13 | 35 years |
| Jason Alexander | George Costanza | 1959-09-23 | 36 years |
| Michael Richards | Cosmo Kramer | 1949-07-24 | 47 years |
| Jerry Stiller | Frank Costanza | Not confirmed | Withheld |
| Estelle Harris | Estelle Costanza | Not confirmed | Withheld |
| Heidi Swedberg | Susan Ross | Not confirmed | Withheld |
Selected actor ages by episode in Season 8
Compare completed birthdays across this season’s original air dates. Episode links select that broadcast in the explorer. These comparisons do not assert that each actor appeared in every episode.
| Episode | Air date / source | Jerry Seinfeld | Julia Louis-Dreyfus | Jason Alexander |
|---|---|---|---|---|
| Episode 1: The Foundation | 1996-09-19 | 42 | 35 | 36 |
| Episode 2: The Soul Mate | 1996-09-26 | 42 | 35 | 37 |
| Episode 3: The Bizarro Jerry | 1996-10-03 | 42 | 35 | 37 |
| Episode 4: The Little Kicks | 1996-10-10 | 42 | 35 | 37 |
| Episode 5: The Package | 1996-10-17 | 42 | 35 | 37 |
| Episode 6: The Fatigues | 1996-10-31 | 42 | 35 | 37 |
| Episode 7: The Checks | 1996-11-07 | 42 | 35 | 37 |
| Episode 8: The Chicken Roaster | 1996-11-14 | 42 | 35 | 37 |
| Episode 9: The Abstinence | 1996-11-21 | 42 | 35 | 37 |
| Episode 10: The Andrea Doria | 1996-12-19 | 42 | 35 | 37 |
| Episode 11: The Little Jerry | 1997-01-09 | 42 | 35 | 37 |
| Episode 12: The Money | 1997-01-16 | 42 | 36 | 37 |
| Episode 13: The Comeback | 1997-01-30 | 42 | 36 | 37 |
| Episode 14: The Van Buren Boys | 1997-02-06 | 42 | 36 | 37 |
| Episode 15: The Susie | 1997-02-13 | 42 | 36 | 37 |
| Episode 16: The Pothole | 1997-02-20 | 42 | 36 | 37 |
| Episode 17: The English Patient | 1997-03-13 | 42 | 36 | 37 |
| Episode 18: The Nap | 1997-04-10 | 42 | 36 | 37 |
| Episode 19: The Yada Yada | 1997-04-24 | 42 | 36 | 37 |
| Episode 20: The Millennium | 1997-05-01 | 43 | 36 | 37 |
| Episode 21: The Muffin Tops | 1997-05-08 | 43 | 36 | 37 |
| Episode 22: The Summer of George | 1997-05-15 | 43 | 36 | 37 |
All Seinfeld seasons and cast ages
How these ages are calculated
Subtract the actor’s birth year from the air-date year, then subtract one if their birthday had not yet occurred. Tables and the episode explorer use completed years. Missing, invalid, conflicting or unchecked birthdays do not produce an exact age. Historical broadcast ages do not imply that an actor is still living.
Premiere dates and matched birthdays were cross-checked against TVmaze’s Seinfeld guide on 2026-10-16. Actor-name links identify birthday sources; premiere-date links identify episode sources. TVmaze data is used under CC BY-SA. A database match is not independent biographical authentication; unresolved disagreements are withheld. Episode rosters and guest credits remain under review.