Warren Frost plays Susan's dad on Seinfeld.
George's dad was Frank Costanza played by Jerry Stiller.
Norman Brenner has: Played Ian in "Seinfeld" in 1989. Played Man in "Seinfeld" in 1989. Played Moviegoer in "Seinfeld" in 1989. Played Man in Coffee Shop in "Seinfeld" in 1989. Played Rider in "Seinfeld" in 1989. Played Man Waiting in Restaurant in "Seinfeld" in 1989. Played Man in Bar in "Seinfeld" in 1989. Played Passerby in "Seinfeld" in 1989. Played Manager in "Seinfeld" in 1989. Played Man on Bus in "Seinfeld" in 1989. Played Man in Party in "Seinfeld" in 1989. Played Man Walking Into Elevator in "Seinfeld" in 1989. Played Man on Sidewalk in "Seinfeld" in 1989. Played Sofa Salesman in "Seinfeld" in 1989. Played Orderly in "Seinfeld" in 1989. Played Beder in "Seinfeld" in 1989. Played Man at Airport in "Seinfeld" in 1989. Played Man in Restaurant in "Seinfeld" in 1989. Played Man in Store in "Seinfeld" in 1989. Played Man in Library in "Seinfeld" in 1989. Played Clerk in "Seinfeld" in 1989. Played Co-Worker in "Seinfeld" in 1989. Played Chef in "Seinfeld" in 1989. Played Coffee Customer in "Curb Your Enthusiasm" in 1999.
Susan
Morty Seinfeld, played by Barney Martin, is Jerry Seinfeld's father. Helen Seinfeld, played by Liz Sheridan, is Jerry Seinfeld's mother.
John Cheever
John Cheever
Reni Santoni played Poppie on Seinfeld
Susan Ross not sure what the actresses name is though
Jeff Bye has: Played Man in Theatre in "Seinfeld" in 1989. Played Man at Bookstore in "Seinfeld" in 1989. Played Man at Shop in "Seinfeld" in 1989. Played Counter Guy in "Seinfeld" in 1989. Played Tom Cosley in "Seinfeld" in 1989.
Jerry Seinfeld
She called him "Georgie Boy" and "sweet heart".
Angela Dohrmann played Donna Chang on Seinfeld.