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 Danny Woodburn Mickey Guest Star Daniel von Bargen Krugerg Guest Star Cindy Ambuehl Sophie Guest Star Henry Woronicz Father Curtis Guest Star Ursaline Bryant Dr. Wexler Guest Star Daniel Dae Kim Student 1 Guest Star Alex Craig Mann Student 2 Guest Star Brian Posehn Artie Guest Star Alec Holland Co-Worker 1 Guest Star Suli McCullough Co-Worker 2 Guest Star Larry David Executive Producer George Shapiro Executive Producer Howard West Executive Producer Andy Ackerman Director Jennifer Crittenden Writer