Jerry Seinfeld Jerry Seinfeld Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Julia Louis-Dreyfus Elaine Benes Actor Jerry Stiller Frank Costanza Guest Star Estelle Harris Estelle Constanza Guest Star Lori Loughlin Patty Guest Star Richard Fancy Lippman Guest Star Ross Malinger Adam Lippman Guest Star Matt McCoy Lloyd Braun Guest Star Bruce Mahler Rabbi Glickman Guest Star Larry David Executive Producer George Shapiro Executive Producer Howard West Executive Producer Andy Ackerman Director Steve Koren Writer