Millicent is a horse trainer and the operator of The Grateful Gelding Stables. Homer adopted a horse from her for Lisa, in attempt to win back her love. Homer had to take up a second job at the Kwik-E-Mart to afford the pony.
Behind the laughter
The character's appearance is modeled after actress Katharine Hepburn.
- Episode – "Lisa's Pony"
- Episode – "Marge vs. Singles, Seniors, Childless Couples and Teens and Gays"