Lady Tremaine is the main antagonist of Cinderella. She is the stepmother of the title protagonist, like every version's stepmother. She has two daughters (named Drizella and Anastasia in this version) of her own whom she spoils. In this version, she has a cat named Lucifer.
She was voiced by the late Eleanor Audley in the original film, and Susanne Blakeslee in the two sequels.