"The Worst Witch" series is based on the first four "Worst Witch" books by Jill Murphy. It follows the adventures of Mildred Hubble, (Georgina Sherrington) a witch attending Cackles Academy. She's called the "Worst Witch" because she's always caught getting into trouble. Written by
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Katy Allen replaces Felicity Jones as Ethel Hallow from the second season onwards. According to Jones's mother, this was because she had missed home during the first season's production. Jones would later return as Ethel in the spin-off Weirdsister College. See more
From the episode Miss Cackle's Birthday Surprise onward, the opening sequence featured Jessica Fox (Enid) along with the other girls. See more