The popular American sitcom Seinfeld featured a cast of characters that have become iconic in the world of television. Jerry Seinfeld is the main character, portrayed by comedian Jerry Seinfeld. His best friend Cosmo Kramer is played by Michael Richards and his neighbor Newman is played by Wayne Knight. Jerry's ex-girlfriend Elaine BENES is played by Julia Louis-Dreyfus. George Costanza, Jerry's other best friend, is played by Jason Alexander. Finally, C.M.O.Kramer is an alias used by Kramer when he is trying to avoid being recognized.