Mrs. Grouch

 Mrs. Grouch  is Oscar the Grouch 's mother. She is also the mother of Oscar 's brothers, Ernest  &  Otto  & Oscar 's sister  Bunny. She has visited Sesame Street various times over the years, including episode 3023 to make sure that her son is still grouchy & hasn't been turned nice. That same year, she also appeared in the special ''[http://muppet.wikia.com/wiki/Sesame_Street_Stays_Up_Late! Sesame Street Stays Up Late]'', communicating by phone with her son & other relatives. In her most recent visit to Sesame Street, she was performed by Leslie Carrara-Rudolph.

Mrs. Grouch lives in Illinois. Oscar remembers her gift of a tattered sneaker to him as a baby fondly enough to sing about it in his signature song, "I Love Trash". Her name is mentioned in Sesame Street Magazine (November 1995). Whether she is a widow or divorced from Oscar 's father  is unknown.

According to a talk show appearance on Canadian radio, Oscar 's father is from St. David's Ridge, New Brunswick & his mother grew up in Nova Scotia. St. David's is near Moores Mills, New Brunswick, a community also mentioned in the appearance. That is a reference to Caroll Spinney's real-life parents.

A running gag between Mrs. Grouch & Oscar is that whenever Oscar would say "please", she would wash his mouth out with vanilla ice cream.