We're Getting Mutants in the MCU - The Loop
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- Aunt Agatha is the main antagonist of the Halloween TV film Double, Double, Toil and Trouble. She is the evil aunt of the twins Kelly and Lynn Farmer (both of whom are played by the Olsen twins) and like her nieces, she was a twin sister herself, her twin sister being good Aunt Sophia, whom Aunt Agatha keeps trapped inside a mirror. Cloris Leachman portrayed her as an adult, while Ashley Olsen (who also played Lynn) played her as a child.