Margaret Kingsleigh is the older sister of Alice in Tim Burton's Alice in Wonderland. Margaret was intending to keep Hamish Ascot's surprise proposal to Alice a secret. Though she had to reveal the plans to Alice after The Chataway Sisters spilled the beans about this proposal.
She's unaware that her husband, Lowell is cheating on her with his "old friend", Hattie.
- Although her married name is never revealed in the movie, the first draft of Linda Woolverton's screenplay called her Margaret Manchester.