Mary-Kate Olsen is a fictional character portrayed by Mary-Kate Olsen in the TV series The Simpsons.
In the first episode they appeared in, titled Diatribe of a Mad Housewife (season 15), they were 17 years old.
They appear in 1 episodes out of a total of 768 aired so far
Episodes1
Diatribe of a Mad Housewife
episode S15.E10 january 2004Marge is inspired to write a novel, but the storyline of the book (a fat, mean husband, and a handsome, sweet neighbor) makes Homer jealous.
