Jerry Seinfeld Jerry Seinfeld Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Julia Louis-Dreyfus Elaine Benes Actor Wayne Knight Newman Guest Star Barney Martin Morty Guest Star Liz Sheridan Helen Guest Star Kellie Waymire Vivian Guest Star Audrey Kissel Tara Guest Star James Colton Jimmy Guest Star Gene Dynarski Izzy Mandelbaum Jr. Guest Star Yvonne Farrow Employee Guest Star Lloyd Bridges Izzy Mandelbaum Guest Star Larry David Executive Producer George Shapiro Executive Producer Howard West Executive Producer Andy Ackerman Director Dan O'Keefe Writer