Seinfeld Season 4 cast ages

How old were Seinfeld actors in Season 4?

Jerry Seinfeld was 38, Julia Louis-Dreyfus was 31, Jason Alexander was 32 years old on 1992-08-12, the Season 4 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 Trip (1)”.

Selected cast ages on 1992-08-12

Seinfeld: selected actors at the Season 4 premiere
Actor	Character	Birthday	Age on air date
Jerry Seinfeld	Jerry Seinfeld	1954-04-29	38 years
Julia Louis-Dreyfus	Elaine Benes	1961-01-13	31 years
Jason Alexander	George Costanza	1959-09-23	32 years
Michael Richards	Cosmo Kramer	1949-07-24	43 years

Selected actor ages by episode in Season 4

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 Trip (Part 1)	1992-08-12	38	31	32
Episode 2: The Trip (Part 2)	1992-08-19	38	31	32
Episode 3: The Pitch	1992-09-16	38	31	32
Episode 4: The Ticket	1992-09-16	38	31	32
Episode 5: The Wallet	1992-09-23	38	31	33
Episode 6: The Watch	1992-09-30	38	31	33
Episode 7: The Bubble Boy	1992-10-07	38	31	33
Episode 8: The Cheever Letters	1992-10-28	38	31	33
Episode 9: The Opera	1992-11-04	38	31	33
Episode 10: The Virgin	1992-11-11	38	31	33
Episode 11: The Contest	1992-11-18	38	31	33
Episode 12: The Airport	1992-11-25	38	31	33
Episode 13: The Pick	1992-12-16	38	31	33
Episode 14: The Movie	1993-01-06	38	31	33
Episode 15: The Visa	1993-01-27	38	32	33
Episode 16: The Shoes	1993-02-04	38	32	33
Episode 17: The Outing	1993-02-11	38	32	33
Episode 18: The Old Man	1993-02-18	38	32	33
Episode 19: The Implant	1993-02-25	38	32	33
Episode 20: The Junior Mint	1993-03-18	38	32	33
Episode 21: The Smelly Car	1993-04-15	38	32	33
Episode 22: The Handicap Spot	1993-05-13	39	32	33
Episode 23: The Pilot (Part 1)	1993-05-20	39	32	33
Episode 24: The Pilot (Part 2)	1993-05-20	39	32	33

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.

More about Seinfeld cast ages

Seinfeld Cast Ages in Season 1: George Was 29, but Elaine Arrived Later