Jerry Seinfeld Jerry Seinfeld Actor Julia Louis-Dreyfus Elaine Benes Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Marisa Tomei Herself Guest Star Liz Sheridan Helen Guest Star Barney Martin Morty Guest Star Heidi Swedberg Susan Ross Guest Star Walter Olkewicz Nick Guest Star Annabelle Gurwitch Katy Guest Star Sandy Baron Jack Klompus Guest Star Ann Morgan Guilbert Evelyn Guest Star Frances Bay Mrs. Choate Guest Star Bill Macy Herb Guest Star Jesse White Ralph Guest Star Larry David Executive Producer George Shapiro Executive Producer Howard West Executive Producer