Jerry Seinfeld Jerry Seinfeld Creator, Actor Julia Louis-Dreyfus Elaine Benes Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Wayne Knight Newman Guest Star Barney Martin Morty Guest Star Liz Sheridan Helen Guest Star Bruce Davison Wyck Guest Star Lee Arenberg Mike Guest Star Tim DeKay Kevin Guest Star Richard Herd Wilhelm Guest Star Lisa Mende Carol Guest Star John O'Hurley J. Peterman Guest Star Chelsea Noble Danielle Guest Star Joe Urla Dugan Guest Star Jill Talley Gail Guest Star Toshi Toda Mr. Tanaka Guest Star Heidi Swedberg Actor Estelle Harris Actor Jerry Stiller Actor Larry David Executive Producer Andy Ackerman Director George Shapiro Executive Producer Howard West Executive Producer Steve Koren Writer Alec Berg Writer Peter Mehlman Writer Spike Feresten Writer Jill Franklyn Writer Jeff Schaffer Writer