Jerry Seinfeld Jerry Seinfeld Actor Julia Louis-Dreyfus Elaine Benes Actor Jason Alexander George Costanza Actor Michael Richards Cosmo Kramer Actor Janeane Garofalo Jeannie Guest Star Heidi Swedberg Susan Ross Guest Star Stephen Root Mr. Lager Guest Star Victor Raider-Wexler Doctor Guest Star John Riggi Teller Guest Star Sue Goodman Clerk Guest Star Larry David Executive Producer, Writer George Shapiro Executive Producer Howard West Executive Producer Andy Ackerman Director