From Wikipedia, the free encyclopedia. Estelle Harris (born Estelle Nussbaum, April 4, 1928) is an American actress, comedienne, and voice artist, often recognized for her shrill, grating voice. She is best known for her role as Estelle Costanza on the TV series Seinfeld from 1992 to 1998. She is also known as the voice of Mrs. Potato Head in Toy Story 2 (1999) and Toy Story 3 (2010), and Muriel on The Suite Life of Zack & Cody. Description above from the Wikipedia article Estelle Harris, licensed under CC-BY-SA, full list of contributors on Wikipedia.