Seinfeld stars Jerry Seinfeld as a fictionalised version of himself, alongside Julia Louis-Dreyfus as Elaine Benes, Jason Alexander as George Costanza and Michael Richards as Cosmo Kramer.
Main cast
- Jerry SeinfeldJerry Seinfeld1–9Main
- George CostanzaJason Alexander1–9Main
- Elaine BenesJulia Louis-Dreyfus1–9Main
- Cosmo KramerMichael Richards1–9Main
Supporting cast
- NewmanWayne Knight3–9Supp
- Frank CostanzaJerry Stiller4–9Supp
- Estelle CostanzaEstelle Harris4–9Supp
- Morty SeinfeldBarney Martin1–9Supp
- Helen SeinfeldLiz Sheridan1–9Supp
- J. PetermanJohn O’Hurley5–9Supp
- Susan RossHeidi Swedberg4–7Supp
Guest & voice
- Mickey AbbottDanny Woodburn6–8Guest
- Mr. LippmanJohn Kapelos2–4Guest
- RamonCarlos Jacott5Guest
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About this cast
Seinfeld is an American sitcom that aired on NBC from 1989 to 1998, following the lives of four friends in New York City. The show is centred around comedian Jerry Seinfeld’s stand-up routines and the hilarious, often petty, misadventures of him and his three closest companions.
FAQs
Who plays Jerry Seinfeld in Seinfeld?
Jerry Seinfeld plays a fictionalised version of himself, the main character and a stand-up comedian.
Who plays George Costanza in Seinfeld?
Jason Alexander plays George Costanza, Jerry’s neurotic and often hapless best friend.
Who plays Elaine Benes in Seinfeld?
Julia Louis-Dreyfus plays Elaine Benes, Jerry’s witty and independent ex-girlfriend.
Who plays Cosmo Kramer in Seinfeld?
Michael Richards plays Cosmo Kramer, Jerry’s eccentric and energetic neighbour.
Which actor plays Newman in Seinfeld?
Wayne Knight plays Newman, Kramer’s rotund friend and Jerry’s neighbour.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026