Estelle Harris
"Seinfeld" fans are paying tribute to the late Estelle Harris by sharing all of Mrs. Costanza's best moments.
Actor Jason Alexander is paying tribute to his "Seinfeld" mother, Estelle Harris, who played Mrs. Costanza on the NBC sitcom.
Actress Estelle Harris, who was best known for her role as Mrs. Costanza on "Seinfeld," has passed away at 93…