Estelle Harris (nee Nussbaum; April 4, 1928) is an American actress, voice artist and comedian. Easily recognized by her distinctive, high-pitched voice, she is best known for her roles as Estelle Costanza on Seinfeld, the voice of Mrs. Potato Head in the Toy Story franchise, and Muriel on The Suite Life of Zack & Cody.

Answer this question based on the passage: who plays mrs potato head in toy story? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: Easily recognized by her distinctive, high-pitched voice, she is best known for her roles as Estelle Costanza on Seinfeld, the voice of Mrs. Potato Head in the Toy Story franchise, and Muriel on The Suite Life of Zack & Cody. So, the answer is Estelle Harris.