Splendora Agatha "Aggie" Cromwell is a powerful witch who is the mother of Gwen Piper and the Grandmother of Marnie Piper, Dylan Piper, and Sophie Piper. She is known most for her role in Return to Halloweentown, for whom she had the power no one has had. In Halloweentown she and Marnie stoped Kalabar from taking over Halloweentown. In Halloweentown II: Kalabar's Revenge, Aggie is under the grey spell with Marnie and Luke. In Halloweentown High she is a teacher who is fond of the principal. In Return to Halloweentown she is helping Sophie with her training. She is played by Debbie Reynolds, and Sara Paxton. She also is somewhat looked down by her daughter, Gwen Piper. Marnie Piper and the other Piper children absolutley adore her.