Jerry Seinfeld Jerry Seinfeld Actor Julia Louis-Dreyfus Elaine Benes Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Patrick Warburton David Puddy Guest Star Jerry Stiller Frank Costanza Guest Star Estelle Harris Estelle Constanza Guest Star Marla Sucharetza Nancy Klopper Guest Star Lou Cutell Dr. Cooperman Guest Star Yvette Cruise Clerk Guest Star Jeff Coopwood Security Guard Guest Star Judith Shelton Sally Guest Star Apollo Dukakis Doctor Howard Copperman Guest Star Larry David Executive Producer George Shapiro Executive Producer Howard West Executive Producer Andy Ackerman Director Marjorie Gross Writer Jonathan Gross Writer Ron Hauge Writer Charlie Rubin Writer